Wu Zhang

Name: 张武; Wu Zhang

Organization: Anhui Normal University

Department: Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science

Title: Professor

Chemicals
References

Pd–ZnO nanowire arrays as recyclable catalysts for 4-nitrophenol reduction and Suzuki coupling reactions

Co-reporter:Qiyan Hu;Xiaowang Liu;Lin Tang;Dewen Min;Tianchao Shi

RSC Advances (2011-Present) 2017 vol. 7(Issue 13) pp:7964-7972

Publication Date(Web):2017/01/20

DOI:10.1039/C6RA28467A

In this work, we report a facile approach for the preparation of Pd nanoparticle–ZnO nanowire arrays followed by demonstrating their use as recyclable catalyst for reactions under different conditions. The facile synthesis largely relies on a spontaneous reduction of PdCl42− at the surface of oriented ZnO nanowires grown on a Zn foil. This is due to a combination of the strongly reducing ability of Zn foil and the semiconducting nature of ZnO nanowires. At room temperature and under a weak alkaline condition, the as-prepared Pd nanoparticle–ZnO nanowire arrays show a catalytic activity factor up to 76.6 s−1 g−1 in the reduction of 4-nitrophenol and no obvious decreases in the catalytic activity even after use of 10 times. Meanwhile, the as-prepared Pd nanoparticle–ZnO nanowire arrays exhibit extraordinary catalytic activity toward Suzuki and carbonylative Suzuki reactions at a higher temperature under a stronger alkaline condition. The outstanding performance of the hybrid nanowire arrays is mainly originated from the small size of the Pd nanoparticles (∼2–4 nm) with clean surfaces, as well as a strong affinity between the Pd nanoparticles and ZnO nanowires, leading to marginable catalyst loss and aggregation. Considering the multiple choices of both noble metal nanocatalyst and transition metal oxide nanowire array, we expect noble metal nanoparticle-transition metal oxide nanowire arrays to be emerged as a new class of recyclable catalysts attractive for diverse organic reactions to develop pharmaceuticals, natural products and advanced functional materials.

Pd–ZnO nanowire arrays as recyclable catalysts for 4-nitrophenol reduction and Suzuki coupling reactions

Co-reporter:Qiyan Hu;Xiaowang Liu;Lin Tang;Dewen Min;Tianchao Shi

RSC Advances (2011-Present) 2017 vol. 7(Issue 13) pp:7964-7972

Publication Date(Web):2017/01/20

DOI:10.1039/C6RA28467A

A general and rapid approach to hybrid metal nanoparticle–ZnO nanowire arrays and their use as active substrates for surface-enhanced Raman scattering detection

Co-reporter:Qiyan Hu, Xiaowang Liu, Chaoting Wu, Qing You, Tianchao Shi and Wu Zhang

RSC Advances 2016 vol. 6(Issue 2) pp:1542-1548

Publication Date(Web):18 Dec 2015

DOI:10.1039/C5RA24113H

We report a general and facile approach for the preparation of metal nanoparticle (such as Cu, Ag, Au, Pt and Ni)–ZnO hybrid nanowire arrays by taking advantage of a spontaneous redox reaction between the ZnO–Zn substrates and corresponding metal precursors in aqueous solution. The size and density of the metal nanoparticles grown on the ZnO nanowire can be rationally controlled by adjusting the reaction time. Interestingly, the plasmonic nanoparticles render the prepared ZnO-based hybrid nanoarrays with the ability to enhance surface-Raman scattering signals of a diverse array of molecules, including Rh 6G, 4-mercaptobenzoic acid and 4-nitrothiophenol. Moreover, a mesoporous arrangement of Ag nanoparticles with clean surfaces enables both high sensitivity and extraordinary reproducibility in the surface-enhanced Raman scattering (SERS) detection. The outstanding performance of the hybrid ZnO NW arrays in the SERS application, combined with the benefit of their fast preparation (<30 s), makes them particularly useful in rapid SERS detection of bioactive molecules for potential clinical diagnosis.

CuO nanoparticle-catalyzed diaminations for synthesis of benzimidazole derivatives

Co-reporter:Dan Yu;Qing You;Xinming Zhang;Guide Tao

Applied Organometallic Chemistry 2016 Volume 30( Issue 8) pp:695-698

Publication Date(Web):

DOI:10.1002/aoc.3492

Copper oxide nanoparticles have been applied as an efficient catalyst for the formation of C–N bonds. They can catalyze diaminations for the regiospecific synthesis of 1,2-disubstituted benzimidazoles from 1,2-dihaloarenes and N-arylamidines. The best performance has been achieved using CuO nanoparticles with average diameter of 6.5 nm. In addition, the catalyst can be recycled and reused without any significant decrease in catalytic activity. Copyright © 2016 John Wiley & Sons, Ltd.

Homogeneous core–shell NiCo2S4 nanostructures supported on nickel foam for supercapacitors

Co-reporter:Wei Kong, Chenchen Lu, Wu Zhang, Jun Pu and Zhenghua Wang

Journal of Materials Chemistry A 2015 vol. 3(Issue 23) pp:12452-12460

Publication Date(Web):07 May 2015

DOI:10.1039/C5TA02432C

In this study, we report the fabrication of NiCo2S4 with a homogeneous core–shell nanostructure in which NiCo2S4 nanotubes are wrapped by NiCo2S4 nanosheets. The core–shell structured NiCo2S4 was in situ grown on nickel foam and can be directly applied as a supercapacitor electrode. Electrochemical tests demonstrate that the NiCo2S4 electrode achieved a high specific capacitance of 1948 mF cm−2 at a current density of 1 mA cm−2, a good rate capability, and an excellent cycling stability. The outstanding performance of the NiCo2S4 electrode can be attributed to its core–shell architecture with good mechanical and electrical contact and rich redox reactions, as well as high transport rate for both electrolyte ions and electrons. By applying NiCo2S4 as the positive electrode and porous carbon as the negative electrode, an asymmetric supercapacitor device was fabricated and it exhibited an excellent electrochemical performance. These results demonstrate that the homogeneous core–shell NiCo2S4 nanostructure is promising for supercapacitor applications.

Synthesis of 1,3,5-triazines via Cu(OAc)2-catalyzed aerobic oxidative coupling of alcohols and amidine hydrochlorides

Co-reporter:Qing You, Fei Wang, Chaoting Wu, Tianchao Shi, Dewen Min, Huajun Chen and Wu Zhang

Organic & Biomolecular Chemistry 2015 vol. 13(Issue 24) pp:6723-6727

Publication Date(Web):07 May 2015

DOI:10.1039/C5OB00724K

Cu(OAc)2 was found to be an efficient catalyst for dehydrogenative synthesis of 1,3,5-triazine derivatives via oxidative coupling reaction of amidine hydrochlorides and alcohols in air. Both aromatic and aliphatic alcohols can be involved in the reaction and thirty-three products were obtained with good to excellent yields. Moreover, the use of a ligand, strong base and organic oxidant is unnecessary.

Mild Cu(OAc)2·H2O-catalyzed synthesis of multi-substituted 1,2,4-triazoles from amidines with nitriles via a N–N/C–N coupling

Co-reporter:Fei Wang, Qing You, Chaoting Wu, Dewen Min, Tianchao Shi, Yuting Kong and Wu Zhang

RSC Advances 2015 vol. 5(Issue 96) pp:78422-78426

Publication Date(Web):03 Sep 2015

DOI:10.1039/C5RA15919A

A simple and efficient Cu(OAc)2·H2O-catalyzed aerobic oxidation of amidines with nitriles for the synthesis of multi-substituted 1,2,4-triazoles has been achieved. The procedure constructs multi-substituted 1,2,4-triazoles and has the advantages of operational simplicity, broad substrate scope, and no need for prefunctionalized reagents. A possible mechanism has been proposed via the cascade N–H functionalization and N–N/C–N bond formation.

Copper/N,N,N,N-Tetramethylethylenediamine-Catalyzed Synthesis of N-Substituted Benzoheterocycles via CS Cross- Coupling at Ambient Temperature in Water

Co-reporter:Na Zhao;Liang Liu;Fei Wang;Jia Li

Advanced Synthesis & Catalysis 2014 Volume 356( Issue 11-12) pp:2575-2579

Publication Date(Web):

DOI:10.1002/adsc.201400043

Synthesis of quinazolines via CuO nanoparticles catalyzed aerobic oxidative coupling of aromatic alcohols and amidines

Co-reporter:Wu Zhang, Fei Guo, Fei Wang, Na Zhao, Liang Liu, Jia Li and Zhenghua Wang

Organic & Biomolecular Chemistry 2014 vol. 12(Issue 30) pp:5752-5756

Publication Date(Web):12 Jun 2014

DOI:10.1039/C4OB00569D

CuO nanoparticles were found to be efficient catalysts for the synthesis of quinazoline derivatives; twenty-four products were obtained with good to excellent yields via reaction of N-arylamidines and aromatic aldehydes or benzyl alcohol in air. Neither a base nor an organic oxidant was necessary, and CuO nanoparticles can be recycled without a significant decrease in catalytic activity.

Nano CuO-catalyzed C–H functionalization of 1,3-azoles with bromoarenes and bromoalkenes

Co-reporter:Wu Zhang, Yujie Tian, Na Zhao, Yuanyuan Wang, Jia Li, Zhenghua Wang

Tetrahedron 2014 70(36) pp: 6120-6126

Publication Date(Web):

DOI:10.1016/j.tet.2014.04.065

1,10-Phenanthroline-Catalyzed Tandem Reaction of 2-Iodoanilines with Isothiocyanates in Water

Co-reporter:Wu Zhang;Yun Yue;Dan Yu;Lei Song;Yang-Yang Xu;Yu-Jie Tian ;Yu-Jun Guo

Advanced Synthesis & Catalysis 2012 Volume 354( Issue 11-12) pp:2283-2287

Publication Date(Web):

DOI:10.1002/adsc.201200175

Abstract

The 1,10-phenanthroline-catalyzed tandem reaction of 2-iodoaniline with isothiocyanate in water is described, which provides an environmentally benign, efficient and simple route for the preparation of 2-aminobenzothiazoles. The present tandem process shows broad substrate scope in the absence of transition metals and phase-transfer catalysts.

Ligand-Free CuO Nanospindle Catalyzed Arylation of Heterocycle C–H Bonds

Co-reporter:Wu Zhang, Qinglong Zeng, Xinming Zhang, Yujie Tian, Yun Yue, Yujun Guo, and Zhenghua Wang

The Journal of Organic Chemistry 2011 Volume 76(Issue 11) pp:4741-4745

Publication Date(Web):April 20, 2011

DOI:10.1021/jo200452x

CuO nanospindles have been developed to efficiently catalyze the direct arylation of heterocycle C–H bonds with moderate to excellent yields. This reaction can be applied to heterocycles such as benzoxazole, benzothiazole, and 1-methylbenzimidazole in the presence of a more environmentally friendly inorganic base like K2CO3 under ligand-free catalytic conditions. In addition, the catalyst can be recycled and reused without any significant decrease in catalytic activity.

Hydrothermal Heck reaction catalyzed by Ni nanoparticles

Co-reporter:Wu Zhang, Hongling Qi, Liusan Li, Xiang Wang, Jie Chen, Kaishan Peng and Zhenghua Wang

Green Chemistry 2009 vol. 11(Issue 8) pp:1194-1200

Publication Date(Web):26 May 2009

DOI:10.1039/B900697D

A novel environmentally benign Heck reaction using Ni nanoparticles as catalysts under hydrothermal conditions has been developed in the absence of phosphine ligands without the protection of an inert atmosphere. The results showed that the aryl iodides and bromides could carry out the coupling reaction with a variety of alkenes by hydrothermal treatment. More importantly, the cheap catalysts are stable under the reaction conditions and retain good to moderate activity for at least six successive runs without any additional activation treatment. This approach would be very useful from a practical viewpoint.

Synthesis and molecular structures of 1-boracyclopent-2-enes

Co-reporter:Ezzat Khan;Rhett Kempe ;Bernd Wrackmeyer

Applied Organometallic Chemistry 2009 Volume 23( Issue 5) pp:204-211

Publication Date(Web):

DOI:10.1002/aoc.1497

Abstract

The reaction of 1-silyl-1-borylalkenes with alkyn-1-yltin compounds affords borol-2-enes, organometallic-substituted allenes, mixtures thereof or even more complex mixtures with buta-1,3-dienes, depending on the third substituent at the CC bond (Bu or Ph), on the number of SiCl functions (two or three) and the nature of the alkyn-1-yltin compound. Six new borol-2-enes were isolated in pure state, and two of them were characterized by X-ray structural analysis. The solution-state structures of all major products were clearly established by multinuclear magnetic resonance methods (¹H, ¹¹B, ¹³C, ²⁹Si, ¹¹⁹Sn NMR). Copyright © 2009 John Wiley & Sons, Ltd.

Self-assembled three-dimensional flower-like -Fe2O3 nanostructures and their application in catalysis

Co-reporter:Wu Zhang;Jie Chen;Xiang Wang;Hongling Qi ;Kaishan Peng

Applied Organometallic Chemistry 2009 Volume 23( Issue 5) pp:200-203

Publication Date(Web):

DOI:10.1002/aoc.1496

Abstract

Three-dimensional flower-like α-Fe₂O₃ nanostructures have been successfully synthesized by a simple surfactant-free environmental friendly solvolthermal process. The as-prepared products were investigated by X-ray powder diffraction, transmission electron microscopy, and field emission scanning electron microscopy. By adjusting the synthetic parameters, the shape of the α-Fe₂O₃ nanostructures can be controlled. The three-dimensional flower-like α-Fe₂O₃ nanostructures were found to be highly active as catalysts for phenol alkylation. The effects of various parameters, such as reaction temperature, reaction time and the amount of catalyst, were studied. The catalyst was stable and could be reused three times in normal atmosphere without suffering appreciable loss in catalytic activity. Copyright © 2009 John Wiley & Sons, Ltd.

Preparation of size-controlled In2O3 nanoparticles

Co-reporter:Peng Zhu;Weiya Wu;Jianping Zhou

Applied Organometallic Chemistry 2007 Volume 21(Issue 10) pp:

Publication Date(Web):7 AUG 2007

DOI:10.1002/aoc.1300

Highly crystalline and monodisperse In₂O₃ nanoparticles were successfully prepared by thermal decomposition of In(dipy)₃Cl₃·2H₂O in oleylamine and oleic acid under inert atmosphere. The size of In₂O₃ nanoparticles could be readily tuned from 10–15 nm to 40–50 nm, depending on the molar ratio of precursor to combined solvent in the reaction system. As-synthesized In₂O₃ nanoparticles have a center-body cubic structure as characterized by powder X-ray diffraction and selected-area electron diffraction. Transmission electron microscopy images showed that In₂O₃ nanoparticles have a narrow size distribution. A relatively strongly PL peak centered at 378 nm could be clearly seen when 10–15 nm In₂O₃ nanoparticles redispersed in cyclohexane were excited at 275 nm at room temperature. Copyright © 2007 John Wiley & Sons, Ltd.