Wen Dong

Name: 董文; Wen Dong

Organization: Guangzhou University

Department: 1 Tianjin Key Laboratory of Structure and Performance for Functional Molecule, College of Chemistry and Life Science

Title: Professor

Chemicals
References

Structures of six photochromic 3d complexes containing 3,3′-azobis-1,2,4-triazole ligand

Co-reporter:Meng Yang, Zhen-Jie OuYang, Wen-Bin Chen, Rong-Fu Zhou, Nan Li and Wen Dong

CrystEngComm 2013 vol. 15(Issue 42) pp:8529-8536

Publication Date(Web):29 Aug 2013

DOI:10.1039/C3CE40736E

Six 3,3′-azobis-1,2,4-triazole (H2ABT) complexes [Mn2 (ABT)(bpy)4(H2O)2]·(ABT)·4H2O (1), [Mn(ABT)(H2O)4]·H2O (2), [Co(ABT)(en)2]·(H2ABT)·2H2O (3), [Cd(ABT)0.5(en)2]·(ABT)0.5·2H2O (4), [Zn(ABT)0.5(en)2]·(ABT)0.5·2H2O (5), [Cu(ABT)0.5(en)2]·(ABT)0.5 (6), where en = ethylenediamine, bpy = 2,2-bipyridine, have been synthesized and characterized by single crystal X-ray diffraction analysis. In complexes 1–6, the unusual face-to-face π–π stacking interactions among heterocyclic aromatic rings and three kinds of hydrogen bonds C–H⋯O, N–H⋯O and O–H⋯O are observed. The π–π stacking, hydrogen bonding and electrostatic interactions are responsible for the stabilization of these 2D and 3D supramolecular structures. The aqueous solutions of 1–6 with the concentration of 6 × 10−5 mol dm−3 show photochromism. The fluorescent properties of solid-state samples of 1–6 have been investigated. The π–π stacking interaction energies for 1–6 were calculated at MP2 level using Gaussian 09 suite and demonstrated.

Synthesis, Structure, and Halo-, Photo-, and Thermochromism Properties of 5-Azotriazolyl Salicylic Acid and Its CdII Complex

Co-reporter:Jiao-Min Lin;Meng Yang;Yan-Xuan Qiu;Wen-Bin Chen;Hua Yan;Fei-Xian Gao;Zhen-Jie OuYang; Wen Dong; Tong-Chun Kuang

ChemPlusChem 2013 Volume 78( Issue 6) pp:598-604

Publication Date(Web):

DOI:10.1002/cplu.201300113

Abstract

A hydrated 5-azotriazolyl salicylic acid of [(H₃ATSA)]⋅2 H₂O (1) and its Cd^II complex of [Cd₂(H₂ATSA)₄]⋅13 H₂O (2) have been synthesized and characterized by single-crystal X-ray diffraction analysis and a neutral trans-Z-enol form of H₃ATSA and another anionic trans-E-enol H₂ATSA⁻ isomer have been found in 1 and 2, respectively. The yellow crystal of 2 can be transformed in situ into red crystals in NaOH solution. The diffuse reflectance and photoluminescent spectra for the crystal powder samples and the aqueous solutions of 1 and 2 have been investigated. The DFT and TDDFT calculations at B3LYP/6–31G* level for 1 and B3LYP/Lanl2dz level for 2 have been used to demonstrate the characteristic absorption spectra and the trans-enol to cis-keto photo- and thermoisomeric reaction for the ATSA³⁻ anion. The onion cell imaging taken by confocal laser scanning microscope was observed with 1 and 2 as fluorescent labels.

Crystal Structures, UV Spectra of Solid Iodide Anionic Water Clusters I–(H2O)1–4, and Electrochemical Reaction of I–(H2O)1–4 → I· + e–(H2O)1–4

Co-reporter:Yanxuan Qiu, Meng Yang, Wenbin Chen, Yuzhi Su, Zhenjie Ouyang, Hua Yan, Feixian Gao, and Wen Dong

The Journal of Physical Chemistry A 2013 Volume 117(Issue 19) pp:4051-4056

Publication Date(Web):April 24, 2013

DOI:10.1021/jp402279k

Four iodide anionic water clusters of I–(H2O)1–4 in two supramolecular complexes of [Fe(phen)3][I2(H2O)3] (1) and [Zn(phen)3][I2(H2O)4.5] (2) have been determined by single-crystal X-ray diffraction analysis. The diffuse reflectance spectra for the solid iodide anionic water clusters of I–(H2O)1–4 were investigated, and their absorption bands were demonstrated by denisty functional theory calculation. The electrochemical reaction of I–(H2O)1–4 → I· + e–(H2O)1–4 with the oxidation potential of Ep = 0.61 eV was first found and reported in two aqueous solutions (1 mmol·dm–3) of 1 and 2.

Unusual π−–π− stacking interactions between 5,5′-azotetrazolate(AT) anions in six AT based 3d metal photochromic complexes

Co-reporter:Jiao-Min Lin, Yan-Xuan Qiu, Wen-Bin Chen, Meng Yang, Ai-Ju Zhou, Wen Dong and Chang-En Tian

CrystEngComm 2012 vol. 14(Issue 8) pp:2779-2786

Publication Date(Web):06 Feb 2012

DOI:10.1039/C2CE06606H

Six 5,5′-azotetrazolate based supramolecular complexes of {[Co(en)3]2(AT)3·3H2O} (1), {[M(en)2(trans-AT)2](trans-H2en)·2H2O} (M = Ni, 2; Cu, 3), {[Ni(en)2(trans-AT)](trans-AT)(trans-H2en)·2H2O} (4), {[Cu(en)2(trans-AT)]·2H2O} (5) and {[Cu(en)2(trans-AT)0.5](trans-AT)0.5} (6) (en = ethylenediamine) have been synthesized and characterized by single crystal X-ray diffraction analysis. The trans-AT2− anions in 1–6 show four different coordinating modes. In 1–6, the unusual face-to-face AT2−–AT2− π−–π− stacking interactions with the separated interplanar center to center distances ranging from 3.32 to 4.0 Å were observed. The π−–π− stacking, hydrogen bonding and electrostatic interactions are responsible for the stabilization of these 3D supramolecular structures. The aqueous solutions of 1–6 with the concentration of 2 × 10−5 mol L−1 show photochromism that originates from the trans–cis isomerisation of AT2− anionic ligands. The onion cell imaging with 1–6 as labels has also been reported.

Syntheses, structures and multi-photoluminescence images with confocal microscopy for three 5,5′-azotetrazolate(AZT) based Zn(II) and Ni(II) complexes

Co-reporter:Jiao-Min Lin, Wen-Bin Chen, Xue-Mei Lin, An-Hui Lin, Chang-Yan Ma, Wen Dong and Chang-En Tian

Chemical Communications 2011 vol. 47(Issue 8) pp:2402-2404

Publication Date(Web):16 Dec 2010

DOI:10.1039/C0CC03720F

Three 5,5′-azotetrazolate based Zn(II) and Ni(II) complexes exhibit novel supramolecular structures and emit multi-photoluminescence under laser excitation and the multi-photoluminescence promises a multi-channel signal photoluminescent material.

Syntheses, structures and properties of seven H2BTA coordinating 3-D metallic complexes containing 0-, 1-, 2-, and 3-D frameworks (H2BTA = bis(tetrazolyl)amine)

Co-reporter:Jiao-Min Lin, Bei-Shu Huang, Yang-Fan Guan, Zhao-Qing Liu, Dong-Yao Wang and Wen Dong

CrystEngComm 2009 vol. 11(Issue 2) pp:329-336

Publication Date(Web):21 Nov 2008

DOI:10.1039/B809415B

Seven 3-D metallic complexes coordinated and controlled by the deprotonated anions of H2BTA ligand (H2BTA = bis(tetrazolyl)amine): a 0-D compound of Co(HBTA)3·4.5H2O (1), two 1-D compounds of Cu(BTA)(H2O)2 (2) and Mn4(BTA)4(H2O)12·2H2O (3), a 2-D compounds [Mn7(BTA)6(OH)2(H2O)12] (4) and three 3-D compounds containing two isomorphous complexes of [Mn(BTA)2Na2(H2O)2] (5) and [Co(BTA)2Na2(H2O)2] (6) as well as Mn(BTA)(H2O) (7) have been synthesized under different synthetic conditions and characterized by single crystal X-ray diffraction analysis. In 1–7, the deprotonated anions of the H2BTA ligand control the different crystal structures using not only the different coordinations to transition metal ions as several different multidentate ligands but simultaneously the formation of complementary intermolecular hydrogen bonds.

Polynuclear Complexes of Macrocyclic Oxamide with Thiocyanate: Syntheses, Crystal Structures and Magnetic Properties

Co-reporter:Ya-Qiu Sun;Dong-Zhao Gao;Dai-Zheng Liao;Chen-Xi Zhang

European Journal of Inorganic Chemistry 2009 Volume 2009( Issue 32) pp:

Publication Date(Web):

DOI:10.1002/ejic.200900967

No abstract is available for this article.

Polynuclear Complexes of Macrocyclic Oxamide with Thiocyanate: Syntheses, Crystal Structures and Magnetic Properties

Co-reporter:Ya-Qiu Sun;Dong-Zhao Gao;Dai-Zheng Liao;Chen-Xi Zhang

European Journal of Inorganic Chemistry 2009 Volume 2009( Issue 19) pp:2825-2834

Publication Date(Web):

DOI:10.1002/ejic.200801231

Abstract

Five complexes with the formula {[(CuL)₂Cr(μ-SCN)₂]OH}_n (1), [Mn(CuL)₂(NCS)₂] (2), [Cu(CuL)₂(NCS)₂] (3), [Ni(CuL)₂(NCS)₂] (4) and [Co(CuL)(NCS)₂(CH₃OH)₂]₂ (5), (H₂L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclopentadeca-7,13-diene) were synthesized and structurally determined. The structure of 1 has oxamido-bridged trinuclear [Cr^IIICu^II₂] units and consists of a 1D helical chain formed by the linking of copper(II) and chromium(III) ions through the oxamido and μ_1,3-NCS bridges. The structure of 2, 3 or 4 consists of oxamido-bridged trinuclear [M^IIICu^II₂] molecules (for 2–4, M = Mn, Cu, Ni, respectively) and arranges in a 1D zig-zag chain. Complex 5 is a composed of a tetranuclear [Co^II₂Cu^II₂] molecule with both the oxamido and μ_1,3-NCS bridges. The variable-temperature magnetic susceptibility measurements (2–300K) of 1, 2, 4 and 5 show pronounced antiferromagnetic interactions between the copper(II) atom and neighbouring metal ions.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)