A series of Mannich base monophenol ligands [2,4-^tBu₂-6-CH₂NMe₂-PhOH (HA), 2,4-^tBu₂-6-CH₂NEt₂-PhOH (HB), 2,4-^tBu₂-6-CH₂Py-PhOH (HC), 2-^tBu-4-Me-6-CH₂Py-PhOH (HD), 4-^tBu-2,6-(CH₂Py)₂-PhOH (HE)] were synthesized by Mannich reaction using phenol and formaldehyde reacting with secondary amine. A series of homoleptic lanthanide complexes [LaA₃ (1), GdA₃ (2), LaB₃ (3), GdB₃ (4), LaC₃ (5), GdC₃ (6), LaD₃ (7), GdD₃ (8), LaE₃ (9), GdE₃ (10)] were prepared by amine elimination reactions of the ligands with Ln[N(SiMe₃)₂]₃ (Ln = La, Gd). Complexes 1, 3, 5, 7 and 9 were all characterized using NMR spectra, and the structures of complexes 3 and 5 were determined using single-crystal X-ray diffraction. Complexes 3 and 5 are isostructural, and the lanthanum center exhibits a distorted octahedral geometry, in which the O(1), O(2) and O(3) atoms occupy three positions and N(1), N(2) and N(3) atoms occupy the other three positions. All complexes were characterized using elemental analysis and infrared spectra. The catalytic properties of complexes 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 for the ring-opening polymerization of ε-caprolactone were studied, and the results show that all complexes are efficient initiators for this ring-opening polymerization reaction. Copyright © 2016 John Wiley & Sons, Ltd.

Six organophosphine/phosphite-stabilized silver(I) N-hydroxysuccinimide complexes of type [C₄H₄NO₃Ag⋅L_n] (L = PPh₃; n = 1, 2a; n = 2, 2b; L = P(OEt)₃; n = 1, 2c; n = 2, 2 d; L = P(OMe)₃; n = 1, 2e; n = 2, 2f) were prepared. These complexes were obtained in high yields and characterized by elemental analysis, ¹H NMR, ¹³ C{¹H} NMR and IR spectroscopy, respectively. The molecular structure of 2b has been determined by X-ray single-crystal analysis in which the silver atom is in a distorted tetrahedral geometry. An interstitial methanol solvent molecule is hydrogen bonded to the oxygen atom of N-hydroxysuccinimide molecule. Complex 2f was used to deposit silver films by metal-organic chemical vapor deposition (MOCVD) for the first time. The silver film obtained at 480 °C is dense and homogeneous, which is composed of many well-isolated, granular particulates spreading all over the substrate surface. Copyright © 2012 John Wiley & Sons, Ltd.

New N-silver(I) acetylbenzamide complexes of type L_n⋅AgNC₉H₈O₂ (L = PPh₃; n = 1, 2a; n = 2, 2b; n = 3, 2c; L = P(OEt)₃; n = 1, 2d; n = 2, 2e; n = 3, 2f) were prepared. These complexes were obtained in high yields and characterized by elemental analysis, ¹H NMR, ¹³C{H} NMR, ³¹P{H} NMR and IR spectroscopy, respectively. The molecular structure of 2b has been determined by X-ray single-crystal analysis in which the silver atom is in a distorted tetrahedral geometry and crystallizes as cis–trans. New N-silver(I) acetylbenzamide complexes have a four-membered ring, which could influence their chemical and physical properties and modulate volatility. Metal organic chemical vapor deposition experiments were carried out successfully at 400°C and 450°C using 2e as precursor for the deposition of silver films, respectively. The high-purity silver film obtained at 400°C is dense and homogeneous. Copyright © 2012 John Wiley & Sons, Ltd.

2,2′-Position aryl-substituted tetracarboxylic dianhydrides including 2,2′-bis(biphenyl)-4,4′,5,5′-biphenyl tetracarboxylic dianhydride and 2,2′-bis[4-(naphthalen-1-yl)phenyl)]-4,4′,5,5′-biphenyl tetracarboxylic dianhydride were synthesized. A new series of aromatic polyimides (PIs) were synthesized via a two-step procedure from 3,3′,4,4′-biphenyl tetracarboxylic dianhydride and the newly synthesized tetracarboxylic dianhydrides monomers reacting with 2,2′-bis[4′-(3″,4″,5″-trifluorophenyl)phenyl]-4,4′-biphenyl diamine. The resulting polymers exhibited excellent organosolubility and thermal properties associated with T_g at 264 °C and high initial thermal decomposition temperatures (T_5%) exceeding 500 °C in argon. Moreover, the fabricated sandwich structured memory devices of Al/PI-a/ITO was determined to present a flash-type memory behaviour, while Al/PI-b/ITO and Al/PI-c/ITO exhibited write-once read-many-times memory capability with different threshold voltages. In addition, Al/polymer/ITO devices showed high stability under a constant stress or continuous read pulse voltage of − 1.0 V. Copyright © 2011 Society of Chemical Industry

As part of a strategy to explore highly functionalized macromolecular semiconductors, two novel polyimides consisting of electron-donating carbazole and triphenylamine side groups are synthesized and characterized. Polyimide films sandwiched between an indium-tin oxide (ITO) bottom electrode and Al top electrode exhibit two accessible conductivity states and can be switched from the low-conductivity state to the high-conductivity state. Memory devices with the configuration of Al/PI(CzBD-DPBPDA)/ITO exhibit bipolar flash-type memory characteristics while that of Al/PI(TPABD-DPBPDA)/ITO demonstrate excellent unipolar ON and OFF switching behavior. Both devices show high ON/OFF current ratios up to 10⁴ and long retention times of 10⁴ s in ambient atmosphere.