Xia Li - Cochemist

A Zn(II) complex with large channels based on 3′-nitro-biphenyl-3,5,4′-tricarboxylic acid: synthesis, crystal structure, fluorescence sensing of ATP, ADP, GTP, and UTP in aqueous solution and drug delivery

Co-reporter:De-chun Zhang

CrystEngComm (1999-Present) 2017 vol. 19(Issue 44) pp:6673-6680

Publication Date(Web):2017/11/13

DOI:10.1039/C7CE01618B

A new coordination complex, namely, [Zn7L2(HL)2(OH−)4(H2O)2]·2H2O (1) [H3L = 3′-nitro-biphenyl-3,5,4′-tricarboxylic acid] was synthesized by a solvothermal reaction. Complex 1 has a 3D open framework with heptanuclear cluster [Zn7O2(OH)4] secondary building units (SBUs) and features an unexpected large porous structure with a pore size of 16.5 × 19.5 Å2, which shows 37.0% porosity as calculated by PLATON. Adenosine triphosphate disodium salt (ATP), adenosine-5′-diphosphate disodium salt (ADP), guanosine 5′-triphosphate (GTP), or uridine 5′-triphosphate (UTP) was discriminated from other phosphate anions using fluorescence spectral analysis by adjusting the excitation wavelength at 287, 287, 306, or 337 nm. Complex 1 showed fluorescence sensing of ATP, ADP, GTP, and UTP in aqueous solution. In addition, complex 1 also exhibited a remarkable capacity for the anticancer drug 5-fluorouracil (5-FU), with a loading content of 46.5 wt%, and presented a slow controlled drug release.

Lanthanide–organic frameworks constructed from naphthalenedisulfonates: structure, luminescence and luminescence sensing properties

Co-reporter:Rui Li, Xiang-Long Qu, Yi-Hua Zhang, Hong-Liang Han and Xia Li

CrystEngComm 2016 vol. 18(Issue 31) pp:5890-5900

Publication Date(Web):22 Jun 2016

DOI:10.1039/C6CE01028H

Two series of Ln3+-coordination frameworks were synthesized by using positional isomers of naphthalenedisulfonate (Nds) ligands, along with oxalate (ox) and 1,10-phenanthroline (phen) ligands under the same experimental conditions, namely, {[Ln(1,5-Nds)0.5(ox)(phen)(H2O)]·H2O}n (Ln = Eu (1), La (2), and Sm (3)), [La(2,6-Nds)(ox)0.5(phen)2(H2O)]n (4) and [Ln(2,6-Nds)0.5(ox)(phen)(H2O)]n (Ln = Eu (5), Gd (6), and Tb (7)). Compounds 4 and 5–7 show different grid-like layers with a {63} topology based on [LaO5N4] and [LnO6N2] polyhedra as uninodal nodes, respectively. However, the 1,5-Nds-based linker can pillar into a high dimensionality pillared-layer microporous motif of complexes 1–3 with a {36·48·56·6} topology based on {LnO7N2} polyhedra as uninodal nodes, affording one-dimensional channels. Notably, highly luminescent microporous pillared-layer Eu3+-framework 1 is a promising luminescence sensor for small organic molecules and metal ions, especially for benzaldehyde and Fe3+. The luminescence behavior of 1 is affected by the solvents and the luminescence color changes from red-pink to blue. The possible luminescence sensing mechanism for Fe3+ and the effect of using different solvents on the luminescence sensing of metal ions were explored. It is noteworthy that complex 1 can be excited with a longer excitation wavelength (358 nm), which is an important requirement for applications.

Temperature-induced 1D lanthanide polymeric frameworks based on Lnn (n = 2, 2, 4, 6) cores: synthesis, crystal structures and luminescence properties

Co-reporter:Jia-Jia Li, Ting-Ting Fan, Xiang-Long Qu, Hong-Liang Han and Xia Li

Dalton Transactions 2016 vol. 45(Issue 7) pp:2924-2935

Publication Date(Web):23 Dec 2015

DOI:10.1039/C5DT04262C

The hydrothermal reaction of the same reactive system containing Ln(NO3)3·6H2O, tetrafluorophthalic acid (H2TFPht), and 1,10-phenanthroline (phen) at different temperatures yielded coordination polymers, [Ln2(TFPht)3(phen)2(H2O)2]·H2O (Ln = Sm 1, Eu 2, Gd 3, Tb 4, Dy 5; at 120 °C), La(TFPht)(TFBA)(phen)(H2O) (6; at 160 °C), Ln3(TFPht)4(TFBA)(phen)3(H2O)3 (Ln = Dy 7, Tb 8, Yb 9; at 160 °C), and Ln2(TFBA)6(phen)2 (Ln = Eu 10, Tb 11; at 180 °C). 2,3,4,5-Tetrafluorobenzoic acid (TFBA) was produced from the decarboxylation of TFPht. X-ray structural analysis reveals that these compounds contain different structural motifs. Complexes 1–5 exhibit zigzag chain structures based on the center-related tetranuclear [Ln4] as SBUs (Secondary Building Units) with two crystallographically independent Ln3+ ions. Complex 6 contains a double chain structure with center-related binuclear [La2] as SBUs. Complexes 7–9 show single chain structures involving center-related hexanuclear [Ln6] as SBUs with three crystallographically independent Ln3+ ions. Complexes 10 and 11 have ribbon chain structures involving binuclear [Ln2] as SBUs with two crystallographically independent Ln3+ ions. The photoluminescence properties of complexes 1–5 were studied. The Eu3+ and Tb3+ complexes exhibit bright red and green emissions with quantum yields of 15.87% for 2 and 23.82% for 4. The two-component Dy:Eu- and three-component Gd:Dy,Eu-doped complexes provided white light emission. Moreover, 2 could be a potential luminescent probe for detecting nitrobenzene and Ni2+ ion through significant fluorescence decrease of Eu3+.

A series of transition metal–organic frameworks: crystal structures, luminescence properties, and sensitizing for luminescent Ln(III) ions in aqueous solution

Co-reporter:Xiang-Long Qu, Xiao-Li Zheng and Xia Li

RSC Advances 2016 vol. 6(Issue 73) pp:69007-69015

Publication Date(Web):13 Jul 2016

DOI:10.1039/C6RA08419B

A series of coordination polymers, namely, [Cd(DPDC)(BPP)·H2O]·H2O (1), Cd4(O-OBA)4(BPP)2 (2), [Zn2(DPDC)2(BTB)(H2O)2]·H2O (3), [Zn(O-OBA)(BPP)]·0.5H2O (4), [Zn(O-OBA)(BPP)]·H2O (5), Cu(DPDC)(BTB) (6) and [Co(O-OBA)(BTB)H2O]·0.5H2O (7) (DPDC = 2,2′-diphenyldicarboxylate, O-OBA = 2,2′-oxybis(benzoate), BPP = 1,3-di(4-pyridyl)propane, and BTB = 1,4-bis(1,2,4-triazol-1-yl)butane) were hydrothermally synthesized and structurally characterized. 1 forms a quadrilateral grid like network with {CdO4N3} polyhedra. 2 exhibits a 2D architecture containing four types of {Cd1O7}, {Cd3O7}, {Cd2O4N2} and {Cd4O4N2} polyhedra. 3 features a ladder like double chain that consists of Zn1–DPDC- and Zn2–DPDC-chains with {Zn1O4N} and {Zn2O4N} polyhedra. 4 possesses a helical 2D framework consisting of Zn2–O-OBA- and Zn1–BPP–Zn2–BPP-helical chains involving {Zn1O2N2} and {Zn2O2N2} tetrahedra. 5 consists of Zn–BPP–Zn–O-OBA-double helical chains with {ZnO2N2} tetrahedra. 6 has a (4, 4) 2D framework formed by Cu–DPDC- and Cu–BTB-chains involving {CuO4N2} octahedra. 7 consists of a 1D zigzag chain where the {CoO4N2} octahedra are bridged by BTB ligands, while the O-OBA behaves as a terminal ligand. Complex 4 shows solvent-dependent luminescence and can be used to detect nitrobenzene via the quenching effect. Moreover, complex 4 can notably sensitize luminescent lanthanide ions in aqueous solution to emit their characteristic emissions.

Unique lanthanide frameworks with 63 topology based on 1,5-naphthalenedisulfonate and 1H-imidazo[4,5-f][1,10]-phenanthroline: syntheses, crystal structure, photoluminescence, and white light emission

Co-reporter:Dou Ma, Rui Huo and Xia Li

CrystEngComm 2015 vol. 17(Issue 34) pp:6575-6582

Publication Date(Web):24 Jul 2015

DOI:10.1039/C5CE01302J

Novel lanthanide–organic frameworks {[Ln2(1,5-NDS)3(IP)4(H2O)2]·9H2O}n (Ln = Pr 1, Sm 2, Eu 3, Gd 4, Dy 5, Tb 6; 1,5-NDS = 1,5-naphthalenedisulfonate, and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) were synthesized and characterized. The complexes possess unique 2D architectures with 63 topology, and their structures consist of three-connected uninodal chain-layer framework with helical characteristics. Complexes 1, 4, 5, and 6 show ligand-based fluorescence, whereas complexes 2 and 3 show typical emission with 4f–4f transitions for Ln(III) ions. The Sm(III) framework (2) exhibits white light emission. The two-component Ln(III) (Gd, Dy, and Pr)-doped Eu(III) complexes also exhibit white light emission. When the Gd(III) ion is incorporated into the Eu(III) framework with arbitrary ratios of Gd:Eu, white light emission is achieved.

3D Microporous LanthanideOrganic Frameworks Constructed from Left- and Right-Handed Helical Chains: Synthesis, Crystal Structure, and Tunable Photoluminescence

Co-reporter:Rui Huo;Dou Ma

European Journal of Inorganic Chemistry 2015 Volume 2015( Issue 5) pp:852-858

Publication Date(Web):

DOI:10.1002/ejic.201403026

Abstract

New lanthanide–organic frameworks, [Ln₂(2,6-NDS)₃(IP)(H₂O)₄]·H₂O {Ln = Sm (1), Eu (2), Tb (3); 2,6-NDS = 2,6-Anaphthalenedisulfonate, IP = 1H-imidazo[4,5-f][1,10]-phenanthroline}, were synthesized and characterized. These complexes are isostructural and have three-dimensional structures (3D) composed of a pair of entanglement double helixes. The structure is an open framework with rhombic channels filled with uncoordinated water molecules. The photoluminescence properties of the Sm^III complex (1) and Eu^III/Tb^III-doped complex were explored by adjusting the excitation wavelengths. Interestingly, Sm^III complex 1 generated a white-light emission, whereas the Eu^III/Tb^III-doped complex (Tb_0.95Eu_0.05) allowed the realization of white-light emission under broad UV wavelengths. An energy transfer for Tb^III ⁵D₄Eu^III ⁵D₀ was observed.

A high-efficiency white light-emitting lanthanide–organic framework assembled from 4,4′-oxybis(benzoic acid), 1,10-phenanthroline and oxalate

Co-reporter:Dou Ma, Xia Li and Rui Huo

Journal of Materials Chemistry A 2014 vol. 2(Issue 43) pp:9073-9076

Publication Date(Web):27 Aug 2014

DOI:10.1039/C4TC01409J

The metal–organic frameworks, [Ln(oba)phen(ox)0.5]n (H2oba = 4,4′-oxybis(benzoic acid), phen = 1,10-phenanthroline and ox = oxalate), have been designed and synthesized. The Eu(III)/Tb(III)-frameworks display highly efficient red/green emissions, respectively. A high-efficiency white light emission was realized through the doping of the Gd(III) framework with Eu(III)/Tb(III).

Lanthanide coordination frameworks: crystal structure, down- and up-conversion luminescence and white light emission

Co-reporter:Yi-Hua Zhang, Xia Li, Shuang Song, Hong-Yu Yang, Dou Ma and Yi-Heng Liu

CrystEngComm 2014 vol. 16(Issue 36) pp:8390-8397

Publication Date(Web):07 Jul 2014

DOI:10.1039/C4CE00923A

Lanthanide–organic frameworks (LnOFs), [Sm(H2N-BDS)0.5(ox)(phen)] (1) and [Ln(H2N-BDS)(ox)0.5(phen)2] (Ln = Eu 2, Gd 3, Tb 4, Er 5, Yb 6; H2N-BDS = 2-amino-1,4-benzenedisulfonate, ox = oxalate, and phen = 1,10-phenanthroline) were obtained using hydrothermal synthesis. Structural analyses revealed that 1 is a three-dimensional (3D) pillared-layer structure constructed from [SmO6N2] polyhedra, and tetradentate H2N-BDS and tetradentate ox ligands, while complexes 2–6 are isostructural 2D frameworks, constructed from [LnO4N4] polyhedra, and bidentate H2N-BDS and tetradentate ox ligands. The LnOFs containing Sm(III), Eu(III) and Tb(III) ions exhibited the characteristic down-conversion luminescence of the corresponding Ln(III) ions. The Gd:Tb,Eu doped complex provided a white light emission. The Gd:Yb,Er doped complex exhibited up-conversion emissions at 410 nm (4H9/2 → 4I15/2, blue), 518–570 nm (4S3/2, 2H11/2 → 4I15/2, green), and 655 nm (4F9/2 → 4I15/2, red).

White light emission by a lanthanide doped Sm(III) framework constructed from 4-sulfobenzoate and 1H-imidazo[4,5-f][1,10]-phenanthroline

Co-reporter:Shuang Song, Xia Li, Yi-Hua Zhang, Rui Huo and Dou Ma

Dalton Transactions 2014 vol. 43(Issue 16) pp:5974-5977

Publication Date(Web):15 Nov 2013

DOI:10.1039/C3DT53139B

The 2D isostructural lanthanide–organic frameworks [Ln(4-SBA)(IP)OH]·1.5H2O (Ln = Sm 1, Eu 2, Gd 3 and Tb 4; 4-SBA = 4-sulfobenzoate and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) display different luminescent behavior. White light emission was realized by introducing single dopant Eu(III) and codopants Eu(III)/Gd(III) or Eu(III)/Tb(III) into the Sm(III) framework for the first time.

Lanthanide Complexes Assembled from 3-Fluorophthalate and 1,10-Phenanthroline: Syntheses, Crystal Structure, Photoluminescence, and White-Light Emission

Co-reporter:Yu-E Cha;Dou Ma;Rui Huo

European Journal of Inorganic Chemistry 2014 Volume 2014( Issue 18) pp:2969-2975

Publication Date(Web):

DOI:10.1002/ejic.201402099

Abstract

Two different crystal forms, [Ln₄(Fpht)₆(phen)₆(H₂O)₄]·nH₂O (Ln = Eu 1, n = 14; Tb 2, n = 12) and [Ln(Fpht)(HFpht)(phen)(H₂O)] (Ln = La 3, Eu 4, Tb 5) were obtained from the one-pot reaction of Ln^III ions with 3-fluorophthalic acid (H₂Fpht) and 1,10-phenanthroline (phen). Complexes 1 and 2 are centrosymmetric tetranuclear molecules with two crystallographically different Ln^III ion environments, [Ln(1)O₆N₂] and [Ln(2)O₄N₄]. The complexes have a tridentate bridging Fpht ligand and a bidentate terminal Fpht ligand. Complexes 3–5 show 2D networks with [LnO₇N₂] polyhedra. There are two kinds of ligands, Fpht and HFpht, which adopt chelating-bridging/monodentate and bidentate-bridging coordination modes, respectively. The La^III complex shows ligand-centered fluorescence. Eu^III and Tb^III complexes display red ⁵D₀ ⁷F_0–4 and green ⁵D₄ ⁷F_6–2 characteristic luminescence, respectively. Intriguingly, white-light emission was produced when Eu^III and Tb^III were codoped into the 2D La^III complex.

Shape-Controlled Synthesis of Monodispersed Ultrasmall CaGd3F11 Nanocrystals for Potential Dual-Modal Probes

Co-reporter: Yang Tian;Hong-Yu Yang;Shanshan Yu ; Xia Li

ChemPlusChem 2014 Volume 79( Issue 11) pp:1584-1589

Publication Date(Web):

DOI:10.1002/cplu.201402085

Abstract

The shape-controlled synthesis of monodispersed CaGd₃F₁₁ nanocrystals by means of a solvothermal method is reported for the first time. Their morphologies can be controlled to spherical nanoparticles and one-dimensional (1D) nanorods by tuning the volumes of oleic acid and octylamine in the reaction solution. Powder X-ray diffraction demonstrated their hexagonal crystalline structure. Transmission electron microscopy showed their ultrasmall sizes (sub-10 nm) and good monodispersity. The organic capping ligands on the CaGd₃F₁₁ surfaces were analyzed through infrared spectra and X-ray photoelectron spectroscopy. Also investigated is the influence of oleic acid and octylamine on the morphology of CaGd₃F₁₁ nanocrystals. Upconversion (UC) luminescence and magnetic resonance imaging (MRI) performance that depend on the shapes of as-prepared CaGd₃F₁₁ were studied further. CaGd₃F₁₁ nanoparticles and nanorods exhibited UC luminescence with green monochrome after doping with Yb³⁺ and Er³⁺ ions. The CaGd₃F₁₁ nanorods emitted a much higher UC intensity than the nanoparticles. The MRI relaxivity of CaGd₃F₁₁ nanorods was enhanced relative to that of nanoparticles.

White light emission based on a single component Sm(III) framework and a two component Eu(III)-doped Gd(III) framework constructed from 2,2′-diphenyl dicarboxylate and 1H-imidazo[4,5-f][1,10]-phenanthroline

Co-reporter:Yi-Hua Zhang, Xia Li and Shuang Song

Chemical Communications 2013 vol. 49(Issue 88) pp:10397-10399

Publication Date(Web):09 Sep 2013

DOI:10.1039/C3CC46397D

New 1D lanthanide–organic frameworks, [Ln(dpdc)1.5(IP)(H2O)]n (Ln = Sm 1, Eu 2, Gd 3; dpdc = 2,2′-diphenyldicarboxylate and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline), were synthesized. White light emission was realized by two approaches: a single component Sm(III) framework and a two-component Eu(III)-doped Gd(III) framework.

White light emission of an Eu(III)-doped Gd(III) complex with 3-sulfobenzoate and 1H-imidazo[4,5-f][1,10]-phenanthroline

Co-reporter:Shuang Song, Xia Li and Yi-Hua Zhang

Dalton Transactions 2013 vol. 42(Issue 29) pp:10409-10412

Publication Date(Web):29 May 2013

DOI:10.1039/C3DT50897H

The complexes [Ln(3-SBA)(IP)OH(H2O)]·H2O (Ln = Gd 1 and Eu 2, 3-SBA = 3-sulfobenzoate, and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) feature 1D chain structure. White-light emission was realized based on the doping concentration of the Eu(III) ion in the Gd(III) complex for the first time. This result opens up a new synthetic strategy for white light emitting materials through two component lanthanide–organic complexes.

Two-dimensional open structures of transition metal(II) coordination polymers constructed from 3-fluorophthalic acid and 4,4′-bipyridine

Co-reporter:Yu-E. Cha, Xia Li, Hong Liang

Polyhedron 2013 50(1) pp: 208-214

Publication Date(Web):

DOI:10.1016/j.poly.2012.11.003

Highly Thermostable One-Dimensional Lanthanide(III) Coordination Polymers Constructed from Benzimidazole-5,6-dicarboxylic Acid and 1,10-Phenanthroline: Synthesis, Structure, and Tunable White-Light Emission

Co-reporter:Xue Ma, Xia Li, Yu-E Cha, and Lin-Pei Jin

Crystal Growth & Design 2012 Volume 12(Issue 11) pp:5227-5232

Publication Date(Web):September 20, 2012

DOI:10.1021/cg300932a

Three novel isostructural lanthanide(III) coordination polymers (LnCPs), {[Ln3(bidc)4(phen)2(NO3)]·2H2O}n (Ln = Gd (1), Eu (2), Tb (3); H2bidc = benzimidazole-5,6-dicarboxylic acid, and phen = 1,10-phenanthroline), were synthesized via hydrothermal reaction and characterized. The complexes crystallize in the chiral space group P212121. They possess 1D structures based on lanthanide trinuclear clusters containing Ln(1)O9, Ln(2)O6N2, and Ln(3)O6N2 polyhedra by bidc linkers, and phen and nitrate act as terminal ligands. The bidc and phen ligands provide efficient energy transfer for the sensitization of Eu(III) and Tb(III) complexes. The complexes 2 and 3 emit red and green light, respectively. Lifetimes and quantum yields of luminescence are 0.86 ms and 13.20% for 2 and 0.32 ms and 2.08% for 3. Tuning of white-light emission by adjusting the doping concentration of Eu(III) and Tb(III) ions in the Gd(III) complex was achieved.

Architectures of transition metal(II) polymeric frameworks constructed from 3- fluorophthalic acid and 1,3-bis(4-pyridyl)propane: synthesis, crystal structures and properties

Co-reporter:Yu-E Cha, Xia Li, Xue Ma, Chong-Qing Wan, Xue-Bin Deng and Lin-Pei Jin

CrystEngComm 2012 vol. 14(Issue 16) pp:5322-5329

Publication Date(Web):15 May 2012

DOI:10.1039/C2CE25464F

Reactions of transition metal(II) salts with a rigid 3-fluorophthalic acid (H2Fpht) and a flexible ligand, 1,3-bis(4-pyridyl)propane (bpp), afforded a series of coordination polymers, [Cu(Fpht)bpp]·0.5H2O (1), [Cu(Fpht)bpp·H2O] (2), [Cd(Fpht)bpp·H2O]·H2O (3), [Co(Fpht)bpp·H2O] (4) and [Ni(Fpht)bpp·H2O] (5). The five complexes were characterized by single crystal X-ray diffraction. 1 and 2 were obtained from a one-pot reaction. 1 possesses a very rare achiral 66 self-catenated layer topology with a {CuO3N2} square-pyramidal coordination geometry; whereas 2 exhibits a chiral 3D 65.8 topology framework with two crystallographically different copper sites, {CuO4N2} octahedral and {CuO3N2} square pyramidal coordination fashions. 3 contains two rare types of double-stranded helices, based on {CdO5N2} pentagonal bipyramidal and {CdO4N2} octahedral coordination fashions. Complexes 4 and 5 are isostructural 3D coordination polymers and are built from right-/left-handed M-Fpht helices and bpp linkers and they possess a 65.8 topology. The results show that metal(II) complexes composed of H2Fpht and bpp ligands exhibit diverse MOF structures depending on the geometric requirement of the metal(II) ions. Complex 5 exhibits ferroelectric and SHG properties, while 4 shows a ferroelectric feature. The fluorescence of the five complexes comes from the π*–π transition of the ligands.

Synthesis, structure and luminescence property of 2D lanthanide complexes with 3-fluorophthalate and oxalate

Co-reporter:Yu-E Cha, Xia Li, Shuang Song

Journal of Solid State Chemistry 2012 Volume 196() pp:40-44

Publication Date(Web):December 2012

DOI:10.1016/j.jssc.2012.07.052

Complexes [Ln2(fpht)2(ox)(H2O)4]·H2O (Ln=Sm 1, Eu 2, Tb 3 and Dy 4; fpht=3-fluorophthalate and ox=oxalate) have been synthesized and structurally characterized by single crystal X-ray diffraction. The four complexes possess similar 2D framework structures constructed from Ln-fpht double-stranded helices and ox linkages. Complexes 2 and 3 display the characteristic emission 5D0→7FJ (J=0–4) transitions of Eu(III) ion and 5D4→7FJ (J=6−3) transitions of Tb(III) ion, respectively. The emission decay curves reveal a monoexponential behavior yielding the lifetime values of 0.266±0.002 ms for 2 and 0.733±0.002 ms for 3. The emission spectrum of 1 shows three weak bands corresponding to the characteristic emission 4G5/2→6H5/2, 4G5/2→6H7/2 and 4G5/2→6H9/2 transitions of Sm(III) ion. The emission spectrum of 4 displays a broad band centered at 438 nm, which comes from the π⁎–π transition of the ligand.Graphical abstractComplexes [Ln2(fpht)2(ox)(H2O)4]·H2O (fpht=3-fluorophthalate, ox=oxalate) possess 2D structures. Sm(III), Eu(III) and Tb(III) complexes show the characteristic fluorescent emission of the Ln(III). Dy(III) complex displays ligand-based luminescent behavior.Highlights► [Ln2(fpht)2(ox)(H2O)4]·H2O (fpht=3-fluorophthalate; ox=oxalate) show 2D structures. ► The 2D structures are constructed from Ln-fpht double-stranded helices and ox linkage. ► The Sm(III), Eu(III) and Tb(III) complexes show the characteristic emission of the Ln(III) ions. ► Dy(III) complex displays ligand-based luminescent behavior.

Unusual double layer coordination polymers constructed from metal(II)-3-fluorophthalate helices and M–tib honeycom layers (tib=1,3,5-tris(1-imidazolyl)benzene)

Co-reporter:Yu-E Cha, Xue Ma, Xia Li, Han-Zhu Shi, Hua-Lu Tan, Yuan Meng

Inorganic Chemistry Communications 2012 20() pp: 108-111

Publication Date(Web):

DOI:10.1016/j.inoche.2012.02.029

A novel addition complex composed of single and double chains constructed from btb–Cd–SO4 units (btb = 1,4-bis(1,2,4-triazol-1-yl)butane)

Co-reporter:Ya-Kun Gu, Xia Li, Hong Liang, Xue-Bin Deng

Inorganic Chemistry Communications 2011 Volume 14(Issue 1) pp:52-55

Publication Date(Web):January 2011

DOI:10.1016/j.inoche.2010.09.029

Reaction of Cd(SO4)26H2O with 1,4-bis(1,2,4-triazol-1-yl)butane (btb) gave a novel addition complex {[Cd2(btb)2(H2O)6(SO4)][Cd(btb)(H2O)2(SO4)2]2H2O}, which was characterized by single crystal X-ray diffraction. The complex composes of 1D cationic double chain and 1D anionic single chain constructed from btb–Cd–SO4 building blocks. The single and double chains are mutually interpenetrating to construct a 3D supramolecular network by inter-chain hydrogen bonds. The fluorescence of the complex is assigned to the intraligand π⁎–π transition of the ligand.A novel addition complex {[Cd2(btb)2(H2O)6(SO4)][Cd(btb)(H2O)2(SO4)2]2H2O} composes of 1D cationic double chain and 1D anionic single chain based on btb–Cd–SO4 building blocks. The single and double chains are mutually interpenetrating to construct a 3D supramolecular network by inter-chain hydrogen bonds.Research highlights► A novel addition complex compose of 1D cationic double chain and 1D anionic single chain constructed from btb-Cd-SO4 building blocks. ► The single and double chain with the different chemical compositions. ► Single and double chains are interpenetrating to construct a 3D supramolecular network via inter-chain hydrogen bonds. ► A new interpenetration motif was presented.

Unique (3,12)-Connected Porous Lanthanide−Organic Frameworks Based on Ln4O4 Clusters: Synthesis, Crystal Structures, Luminescence, and Magnetism

Co-reporter:Xia Li ; Hao-Ling Sun ; Xiao-Shuo Wu ; Xiao Qiu ;Miao Du

Inorganic Chemistry 2010 Volume 49(Issue 4) pp:1865-1871

Publication Date(Web):January 19, 2010

DOI:10.1021/ic902241n

Three porous lanthanide−organic frameworks, [Ln4(OH)4(3-SBA)4(H2O)4]·nH2O [Ln = EuIII (1), n = 10; GdIII (2), n = 10; TbIII (3), n = 8; 3-SBA = 3-sulfobenzoate], have been prepared by a hydrothermal synthesis method. They are isomorphous and crystallize in a tetragonal system with space group P 421c. The structure can be considered to be built up by cubanelike [Ln4(OH)4]8+ secondary building units, which are further connected by 3-SBA to form a 3D coordination framework with 1D pores along the c direction for accommodation of novel T8(3) water tapes or zigzag water chains. Furthermore, in these compounds, the [Ln4(OH)4]8+ units and 3-SBA ligands serve as 12-connected and 3-connected nodes, respectively, resulting in a unique (3,12)-connected framework with the Schläfli symbol of (43)4(420.628.818). The luminescent properties of the EuIII (1) and TbIII (3) complexes have been studied, showing characteristic emissions at room temperature. Variable-temperature magnetic susceptibility studies indicate that the GdIII complex 2 displays weak antiferromagnetic coupling through μ3-OH− pathways.

Synthesis, structure, and luminescence of a novel lead(II) coordination polymer with 1,2-phenylenediacetic acid

Co-reporter:Zhi-Hong Lei, Xia Li, Li-Na Dong

Inorganic Chemistry Communications 2010 Volume 13(Issue 12) pp:1383-1386

Publication Date(Web):December 2010

DOI:10.1016/j.inoche.2010.07.041

A coordination polymer [Pb2(phda)2]n (H2phda = 1,2-phenylenediacetic acid) was synthesized and characterized by single crystal X-ray diffraction. The complex has a (6, 6)-connected 2D framework with topology of (415), in which Pb2+…π interaction is observed. The 2D framework is further assembled by C–H…π interactions, resulting in a 3D supramolecular network. The fluorescence of the complex is assigned to the intraligand π⁎–π transition and the ligand-to-metal charge transfer.A coordination polymer [Pb2(phda)2]n (H2phda = 1,2-phenylenediacetic acid) shows a (6, 6)-connected 2D framework with topology of (415), in which Pb2+…π interaction is observed. The 2D framework is further assembled to a 3D supramolecular network by C–H…π interactions. The fluorescence of the complex is assigned to the intraligand π⁎–π transition and the ligand-to-metal charge transfer.

Synthesis, crystal structure and characterization of lead(II) coordination polymers with tetrafluorosuccinate/hexafluoroglutarate

Co-reporter:Xia Li, Xiao Qiu, Yan-Bin Zhang

Journal of Molecular Structure 2010 Volume 964(1–3) pp:72-77

Publication Date(Web):14 February 2010

DOI:10.1016/j.molstruc.2009.11.013

Two complexes, [Pb(TFSA)(phen)]n (1) and [Pb(HFGA)(phen)]n (2) (TFSA = tetrafluorosuccinate, HFGA = hexafluoroglutarate, and phen = 1,10-phenanthroline) have been synthesized and structurally characterized by single-crystal X-ray diffraction. The 1 shows that the 2-D structure with six normal Pb–ligand bonds and one weak Pb⋯O bond, and then is further connected by C–H⋯O and C–H⋯F hydrogen bonds, forming a 3-D network. The 2 has 1-D structure with four normal Pb–ligand bonds that further produces a 3-D network by C–H⋯O, C–H⋯F hydrogen bonds, and weak Pb⋯O bonds. The two complexes display high thermal stability and luminescent properties.

A 2-D polymer assembled by cubane-like clusters [Tb4(OH)4(phen)3(H2O)3]8+ and 3-sulfobenzoate

Co-reporter:Xia Li, Xiao-Shuo Wu, Xiang-Jun Zheng

Inorganica Chimica Acta 2009 Volume 362(Issue 8) pp:2537-2541

Publication Date(Web):1 June 2009

DOI:10.1016/j.ica.2008.11.019

A coordination polymer {[Tb4(3-SBA)4(OH)4(phen)3(H2O)3] · 7H2O}n (3-SBA = 3-sulfobenzoate, phen = 1,10-phenanthroline) was synthesized and structurally characterized. The complex contains cubane-like clusters, [Tb4(μ3-OH)4(phen)3(H2O)3]8+, which are further linked through 3-SBA ligands to form a 2-D grid-like network structure with topology of (33, 44, 53). The complex exhibits strong photoluminescence of the Tb3+ ion.A 2-D coordination polymer with topology of (33, 44, 53), {[Tb4(3-SBA)4(OH)4(phen)3(H2O)3] · 7H2O}n (3-SBA = 3-sulfobenzoate, phen = 1,10-phenanthroline) was constructed from cubane-ike clusters, [Tb4(μ3-OH)4(phen)3(H2O)3]8+ and 3-SBA ligands as linkage.

Novel 1-D double chain lanthanide complexes: Synthesis, structure and luminescence

Co-reporter:Xia Li, Xiao-Shuo Wu, Hao-Ling Sun, Li-Juan Xu, Guo-Fu Zi

Inorganica Chimica Acta 2009 Volume 362(Issue 8) pp:2837-2841

Publication Date(Web):1 June 2009

DOI:10.1016/j.ica.2009.01.004

Treatment of Ln(NO3)3 · 6H2O with 1, 2-phenylenedioxydiacetic acid (H2PDOA) in ethanol leads to the unusual 1-D double chain complexes {[Ln(PDOA)1.5 (H2O)3] · H2O}n (Ln = Sm (1), Eu (2), Dy (3)), in which the Ln3+ ions are linked by pentadentate and bideatate PDOA ligands in two different directions. The chain looks like a ladder containing two –Ln–O–C–O–Ln– chains and PDOA spacers, which has never been observed in the lanthanide carboxylate complexes, and they exhibit different photoluminescence properties.Treatment of Ln(NO3)3 · 6H2O with 1,2-phenylenedioxydiacetic acid (H2PDOA) in ethanol leads to the unusual 1-D double chain complexes {[Ln(PDOA)1.5(H2O)3] · H2O}n (Ln = Sm(1), Eu (2), Dy (3)), in which the Ln3+ ions are linked by pentadentate and bideatate PDOA ligands in two different directions. And they exhibit different photoluminescence properties.

Hydrothermal synthesis, crystal structure, and luminescence of lanthanide(III) coordination polymers with tetrafluorosuccinate and 1,10-phenanthroline

Co-reporter:Xia Li, Yan-Bin Zhang, Ying-Quan Zou

Journal of Molecular Structure 2009 Volume 919(1–3) pp:277-283

Publication Date(Web):17 February 2009

DOI:10.1016/j.molstruc.2008.09.017

Three new coordination polymers [Nd2(TFSA)3(phen)2]n (1) and {[Ln(TFSA)(phen)(H2O)4]·0.5(TFSA)·2(phen) H2O}n (Ln = Sm, 2 and Dy, 3; TFSA = tetrafluorosuccinate; phen = 1,10-phenanthroline) were synthesized and characterized using X-ray structure analyses and luminescence spectroscopy. The 1 has a 2-D network structure through TFSA ligands via bridging/chelating-bridging pentadentate and bridging/bridging tetradentate coordination modes. The 2 and 3 have novel 1-D chain structures, in which adjacent Ln(III) ions are linked though the single μ2-bridging TFSA ligands as linkages. The emission spectrum in the NIR of 1 corresponds to the 4F3/2 → 4I9/2, 11/2, 13/2 transitions of Nd(III) ion. The emission spectra of 2 and 3 indicate the typical luminescence characteristics of the Sm(III) and Dy(III) ions, respectively.

Tetranuclear Ln(III) complexes with 2-sulfobenzoate and their three-dimensional supramolecular frameworks consolidated through hydrogen-bonding and intermolecular O···π interactions

Co-reporter:Chong-Qing Wan, Xia Li, Chun-Yan Wang, Xiao Qiu

Journal of Molecular Structure 2009 930(1–3) pp: 32-36

Publication Date(Web):

DOI:10.1016/j.molstruc.2009.04.030

Hydrothermal Synthesis, Crystal Structure, and Luminescence Property of Two Lanthanide Coordination Polymers with Diglycolic Acid

Co-reporter:Xia Li;Yan-Ling Ju

Journal of Chemical Crystallography 2009 Volume 39( Issue 3) pp:213-220

Publication Date(Web):2009 March

DOI:10.1007/s10870-008-9462-3

Two new coordination polymers {[Tb2(C4H4O5)3 · 4H2O] · 2H2O}n (1) and {[La2(C4H4O5)3 · 3H2O] · 3H2O}n (2) (C4H4O52− = diglycolato) were prepared by hydrothermal reaction and characterized by X-ray crystallography. The two complexes have different network structures through carboxylate oxygen atoms and ether oxygen atoms from diglycolato ligands linking lanthanide ions. The characteristic transition bands 5D4 → 7FJ (J = 6 − 3) of Tb(III) ion are observed in complex 1.

Synthesis, crystal structure, and fluorescence of two dimeric europium(III) complexes with 2-(trifluoromethyl)benzoate

Co-reporter:Yanqiu LI, Peizhou LI, Xia LI

Journal of Rare Earths 2008 Volume 26(Issue 6) pp:804-808

Publication Date(Web):December 2008

DOI:10.1016/S1002-0721(09)60010-7

Two complexes [Eu2(2-TFMBA)6(2,2'-bipy)2]·2H2O (1) and Eu2(2-TFMBA)6(1,10-phen)2 (2) (2-TFMBA=2-(Trifluoromethyl) benzoate; 2,2'-bipy=2,2'-bipyridine; 1,10-phen=1,10-phenanthroline) were synthesized by solvent method and determined by X-ray diffraction analysis. Complex 1 crystallizes in monoclinic system with space group P21/c, whereas complex 2 crystallizes in triclinic system with space group . Both are binuclear molecules with an inversion center. In complex 1, two center Eu3+ ions are linked together by four 2-TFMBA ligands in bidentate-bridging mode. Each Eu3+ ion is eight-coordinated with six O atoms from five 2-TFMBA ligands and two N atoms from one 2,2'-bipy molecule. In complex 2, two center Eu3+ ions are linked together by four 2-TFMBA ligands in two modes, namely, bidentate-bridging and tridentate-bridging. Each Eu3+ ion is nine-coordinated with seven O atoms from five 2-TFMBA ligands and two N atoms from one 1,10-phen molecule. The two complexes both exhibited strong red fluorescence under ultraviolet light, and the 5D0 → 7Fj (j=0–4) transition emissions of Eu3+ ion were observed in their emission spectra.

1-D and 2-D lanthanide coordination polymers constructed from 4-sulfobenzoate and 1,10-phenanthroline

Co-reporter:Xia Li, Yan-Qiu Li, Xiao-Shuo Wu

Inorganic Chemistry Communications 2008 Volume 11(Issue 7) pp:774-778

Publication Date(Web):July 2008

DOI:10.1016/j.inoche.2008.03.031

Two complexes {[Dy2(4-SBA)3(phen)2(H2O)4] · 2H2O}n (1) and {[Eu2(4-SBA)3(phen)2(H2O)2]}n (2) (4-SBA = 4-sulfobenzoate, phen = 1,10-phenanthroline) were synthesized and their structures were determined by X-ray crystallography. The 1 has a 1-D chain structure by bidentate and tridentate 4-SBA ligands as linkages and 3-D network was formed by strong hydrogen bonds. The 2 has a 2-D network structure by tridentate and tetradentate 4-SBA ligands as linkages. The luminescence properties and thermal stability of the two complexes were investigated.{[Dy2(4-SBA)3(phen)2(H2O)4] · 2H2O}n (1) has a 1-D chain structure while {[Eu2(4-SBA)3(phen)2 · 2H2O]}n (2) has a 2-D network structure (4-SBA = 4-sulfobenzoate, phen = 1,10-phenanthroline).

The first example of tetranuclear lanthanide complexes with 2-sulfobenzoate and 1,10-phenanthroline

Co-reporter:Xia Li, Chun-Yan Wang, Huai-Ming Hu

Inorganic Chemistry Communications 2008 Volume 11(Issue 3) pp:345-348

Publication Date(Web):March 2008

DOI:10.1016/j.inoche.2008.01.001

Four novel complexes {[Ln2(2-SB)3(phen)3(H2O)2] · nH2O}2 (Ln = Sm (1), n = 3; Ln = Eu (2), n = 2; Ln = Tb (3), n = 2; and Ln = Dy (4), n = 2.5; 2-SB = 2-sulfobenzoate, phen = 1,10-phenanthroline), were synthesized by hydrothermal reactions and characterized using single-crystal X-ray diffraction, thermogravimetric analyses and luminescence spectroscopy. In the four complexes, there are two types of Ln(III) ion coordination environments. Ln(III) ions are connected together through 2-SB ligands via μ2-, η3- and η2-coordination modes, resulting in a tetranuclear molecule with central symmetry, indicating novel structural features. The emission spectra of the four complexes indicate the typical luminescence characteristics of the Sm(III) for 1, Eu(III) for 2, Tb(III) for 3, and Dy(III) ions for 4, respectively.Four tetranuclear complexes {[Ln2(2-SB)3(phen)3(H2O)2] · nH2O}2 (Ln = Sm (1), n = 3; Ln = Eu (2), n = 2; Ln = Tb (3), n = 2; and Ln = Dy (4), n = 2.5; 2-SB = 2-sulfobenzoate, phen = 1,10-phenanthroline) were formed by 2-sulfobenzoate linker. It is first example of tetranuclear lanthanide complex of metal centers through carboxylate group linker.

(4, 4)- and (6, 3)-2-D luminescent lanthanide(III) metal-organic frameworks constructed from tetrafluorosuccinate and 1,10-phenanthroline

Co-reporter:Xia Li, Yan-Bin Zhang, Mei Shi, Pei-Zhou Li

Inorganic Chemistry Communications 2008 Volume 11(Issue 8) pp:869-872

Publication Date(Web):August 2008

DOI:10.1016/j.inoche.2008.04.016

Two new coordination polymers [Eu2(TFSA)3(phen)2]n (1) and [Tb2(TFSA)3(phen)4(H2O)2]n (2) (TFSA = tetrafluorosuccinate, phen = 1,10-phenanthroline) have been synthesized and structurally characterized. The 1 has a 2-D grid-like network structure with (4, 4) topology and the 2 has a 2-D honeycomb-like network structure with (6, 3) topology. The two complexes exhibit strong photoluminescence of the Eu(III) for 1 and Tb(III) for 2, respectively.Two new coordination polymers [Eu2(TFSA)3(phen)2]n (1) and [Tb2(TFSA)3(phen)4(H2O)2]n (2) (TFSA = tetrafluorosuccinate, phen = 1,10-phenanthroline) have 2-D network structures with (4, 4) and (6, 3) topology, respectively.

3-D supramolecular frameworks assembled by lanthanide binuclear molecules based on 1,2-phenylenedioxydiacetic acid and 1,10-phenanthroline

Co-reporter:Xia Li, Yan-Qiu Li, Xiang-Jun Zheng, Hao-Ling Sun

Inorganic Chemistry Communications 2008 Volume 11(Issue 7) pp:779-782

Publication Date(Web):July 2008

DOI:10.1016/j.inoche.2008.03.023

The complexes [Ln2(PDOA)3(phen)2(H2O)2] · 2H2O (Ln = Eu (1), Tb (2), and Dy (3); H2PDOA = 1,2-phenylenedioxydiacetic acid; phen = 1,10-phenanthroline) have been synthesized and structurally characterized by single crystal X-ray diffraction methods. The three complexes are all binuclear molecules. The two Ln(III) centers are linked by only one PDOA ligand through its two bidentate-chelating carboxylate groups. PDOA also acts as a terminal ligand using one carboxylate oxygen and ether oxygen atoms to chelate the Ln(III) ion. 3-D supramolecular frameworks are built up by the hydrogen bonds and π–π stacking interactions. The fluorescent spectra of the three complexes show the characteristic emission of the Eu(III) for 1, Tb(III) for 2, and Dy(III) for 3, respectively.The complexes [Ln2(PDOA)3(phen)2(H2O)2] · 2H2O (Ln = Eu (1), Tb (2), and Dy (3); H2PDOA = 1,2-phenylenedioxydiacetic acid; phen = 1,10-phenanthroline) are all binuclear molecules and 3-D supramolecular frameworks are built up by the hydrogen bonds and π–π stacking interactions.

Hydrothermal Synthesis and Crystal Structure of Lanthanum Orotate Supermolecule with A Honeycomb Structure Constructed from Mononuclear Molecules via Hydrogen Bonds

Co-reporter:Li Yanqiu, Ju Yanling, Li Xia, Zhang Tingting, Wang Chunyan, Yu Jingbo

Journal of Rare Earths 2007 Volume 25(Issue 6) pp:770-774

Publication Date(Web):December 2007

DOI:10.1016/S1002-0721(08)60022-8

A new complex of lanthanum orotate [La(C5H3N2O4)2(OH)(H2O)6] · 2(C5H4N2O4) · 9H2O was synthesized using a hydrothermal method. The crystal structure was determined with help of single crystal X-ray diffraction analysis. The complex crystallized in orthorhombic system, Cmc2(1) space group. In the complex, the center lanthanum (III) ion was nine-coordinated with coordination geometry of a distorted monocapped square antiprism, in which two of the nine coordinated oxygen atoms were from two orotate ligands in a monodentate mode, one oxygen atom from a hydroxyl, and the others from six coordinated water molecules. The mononuclear complex [La(C5H3N2O4)2(OH)(H2O)6] · 2(C5H4N2O4) · 9H2O was linked through the hydrogen bonds into an infinite supermolecular honeycomb structure.

Synthesis and Crystal Structure of Complex [Nd(2-FC6H4COO)3·(2-FC6H4COOH)·H2O]2

Co-reporter:Xia Li;Ying-Quan Zou;Hai-Bin Song

Journal of Chemical Crystallography 2007 Volume 37( Issue 8) pp:555-559

Publication Date(Web):2007 August

DOI:10.1007/s10870-007-9210-0

The neodymium complex with 2-fluorobenzoic acid was synthesized and characterized by X-ray diffraction. The complex crystallizes in the triclinic system with space group Pī, lattice parameters: a = 9.2747(10) Å, b = 11.7594(13) Å, c = 13.5158(14) Å, α = 110.220(2)°, β = 93.930(2)°, γ = 90.894(2)°, V = 1378.8(3) Å3, Z = 1, Dcalc = 1.733 Mg/m3. The complex is a binuclear molecule in which four 2-fluorobenzoato groups act as bidentate and tridentate bridges between the two Nd3+ ions. Each Nd3+ ion is additionally chelated by one 2-fluorobenzoato group and coordinated by one 2-fluorobenzoic acid and one water molecule.

White light emission based on a single component Sm(III) framework and a two component Eu(III)-doped Gd(III) framework constructed from 2,2′-diphenyl dicarboxylate and 1H-imidazo[4,5-f][1,10]-phenanthroline

Co-reporter:Yi-Hua Zhang, Xia Li and Shuang Song

Chemical Communications 2013 - vol. 49(Issue 88) pp:NaN10399-10399

Publication Date(Web):2013/09/09

DOI:10.1039/C3CC46397D

New 1D lanthanide–organic frameworks, [Ln(dpdc)1.5(IP)(H2O)]n (Ln = Sm 1, Eu 2, Gd 3; dpdc = 2,2′-diphenyldicarboxylate and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline), were synthesized. White light emission was realized by two approaches: a single component Sm(III) framework and a two-component Eu(III)-doped Gd(III) framework.

White light emission of an Eu(III)-doped Gd(III) complex with 3-sulfobenzoate and 1H-imidazo[4,5-f][1,10]-phenanthroline

Co-reporter:Shuang Song, Xia Li and Yi-Hua Zhang

Dalton Transactions 2013 - vol. 42(Issue 29) pp:NaN10412-10412

Publication Date(Web):2013/05/29

DOI:10.1039/C3DT50897H

The complexes [Ln(3-SBA)(IP)OH(H2O)]·H2O (Ln = Gd 1 and Eu 2, 3-SBA = 3-sulfobenzoate, and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) feature 1D chain structure. White-light emission was realized based on the doping concentration of the Eu(III) ion in the Gd(III) complex for the first time. This result opens up a new synthetic strategy for white light emitting materials through two component lanthanide–organic complexes.

Temperature-induced 1D lanthanide polymeric frameworks based on Lnn (n = 2, 2, 4, 6) cores: synthesis, crystal structures and luminescence properties

Co-reporter:Jia-Jia Li, Ting-Ting Fan, Xiang-Long Qu, Hong-Liang Han and Xia Li

Dalton Transactions 2016 - vol. 45(Issue 7) pp:NaN2935-2935

Publication Date(Web):2015/12/23

DOI:10.1039/C5DT04262C

The hydrothermal reaction of the same reactive system containing Ln(NO3)3·6H2O, tetrafluorophthalic acid (H2TFPht), and 1,10-phenanthroline (phen) at different temperatures yielded coordination polymers, [Ln2(TFPht)3(phen)2(H2O)2]·H2O (Ln = Sm 1, Eu 2, Gd 3, Tb 4, Dy 5; at 120 °C), La(TFPht)(TFBA)(phen)(H2O) (6; at 160 °C), Ln3(TFPht)4(TFBA)(phen)3(H2O)3 (Ln = Dy 7, Tb 8, Yb 9; at 160 °C), and Ln2(TFBA)6(phen)2 (Ln = Eu 10, Tb 11; at 180 °C). 2,3,4,5-Tetrafluorobenzoic acid (TFBA) was produced from the decarboxylation of TFPht. X-ray structural analysis reveals that these compounds contain different structural motifs. Complexes 1–5 exhibit zigzag chain structures based on the center-related tetranuclear [Ln4] as SBUs (Secondary Building Units) with two crystallographically independent Ln3+ ions. Complex 6 contains a double chain structure with center-related binuclear [La2] as SBUs. Complexes 7–9 show single chain structures involving center-related hexanuclear [Ln6] as SBUs with three crystallographically independent Ln3+ ions. Complexes 10 and 11 have ribbon chain structures involving binuclear [Ln2] as SBUs with two crystallographically independent Ln3+ ions. The photoluminescence properties of complexes 1–5 were studied. The Eu3+ and Tb3+ complexes exhibit bright red and green emissions with quantum yields of 15.87% for 2 and 23.82% for 4. The two-component Dy:Eu- and three-component Gd:Dy,Eu-doped complexes provided white light emission. Moreover, 2 could be a potential luminescent probe for detecting nitrobenzene and Ni2+ ion through significant fluorescence decrease of Eu3+.

A high-efficiency white light-emitting lanthanide–organic framework assembled from 4,4′-oxybis(benzoic acid), 1,10-phenanthroline and oxalate

Co-reporter:Dou Ma, Xia Li and Rui Huo

Journal of Materials Chemistry A 2014 - vol. 2(Issue 43) pp:NaN9076-9076

Publication Date(Web):2014/08/27

DOI:10.1039/C4TC01409J

The metal–organic frameworks, [Ln(oba)phen(ox)0.5]n (H2oba = 4,4′-oxybis(benzoic acid), phen = 1,10-phenanthroline and ox = oxalate), have been designed and synthesized. The Eu(III)/Tb(III)-frameworks display highly efficient red/green emissions, respectively. A high-efficiency white light emission was realized through the doping of the Gd(III) framework with Eu(III)/Tb(III).

White light emission by a lanthanide doped Sm(III) framework constructed from 4-sulfobenzoate and 1H-imidazo[4,5-f][1,10]-phenanthroline

Co-reporter:Shuang Song, Xia Li, Yi-Hua Zhang, Rui Huo and Dou Ma

Dalton Transactions 2014 - vol. 43(Issue 16) pp:NaN5977-5977

Publication Date(Web):2013/11/15

DOI:10.1039/C3DT53139B

The 2D isostructural lanthanide–organic frameworks [Ln(4-SBA)(IP)OH]·1.5H2O (Ln = Sm 1, Eu 2, Gd 3 and Tb 4; 4-SBA = 4-sulfobenzoate and IP = 1H-imidazo[4,5-f][1,10]-phenanthroline) display different luminescent behavior. White light emission was realized by introducing single dopant Eu(III) and codopants Eu(III)/Gd(III) or Eu(III)/Tb(III) into the Sm(III) framework for the first time.