Polyoxometalate-based organic-inorganic hybrid compounds containing transition metal mixed-organic-ligand complexes of N-containing and pyridinecarboxylate ligands

Zhao De-Chuan; Hu Yang-Yang; Ding HongGuo Hai-YangCui Xiao-BingZhang XiaoHuo Qi-ShengXu Ji-Qing

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Polyoxometalate-based organic-inorganic hybrid compounds containing transition metal mixed-organic-ligand complexes of N-containing and pyridinecarboxylate ligands

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Five new organic-inorganic hybrid compounds based on the Keggin-type polyoxoanion SiW12O40(4-), namely Cu-3(2,2'-bpy)(3)(inic)(mu(2)-OH)(H2O)SiW12O40center dot 2H(2)O (1), Cu-6(phen)(6)(mu(3)-Cl)(2)(mu(2)-Cl)(2)Cl-2(inic)(2)-SiW12O40center dot 6H(2)O (2), Cu-2(hnic)(2,2'-bpy)(2)Cl(2)H2SiW12O40 (3), Cu-2(nic)(phen)(2)Cl-2(2)SiW12O40 (4) and Cu-2(pic)(2,2'-bpy)(2)Cl(2)SiW12O40 (5) (inic = isonicotinic acid, hnic = 2-hydroxy-nicotinic acid, nic = nicotinic acid, pic = picolinic acid, 2,2'-bpy = 2,2'-bipyridine, phen = 1,10-phenanthroline) have been synthesized and characterized by IR, UV-Vis, XPS, XRD, cyclic voltammetric measurements, photoluminescence analysis and single crystal X-ray diffraction analysis. Crystal analysis reveals that compound 1 exhibits a 2-D double layered framework structure constructed from SiW12O40(4-) and copper-aqua-2,2'-bipy-hydroxyl-isonicotinate complexes. Compound 2 is a 0-D discrete structure formed by SiW12O40(4-) and copper-chloro-isonicotinate-phenanthroline complexes. Compound 3 shows a 1-D single chain structure based on the linkage of copper-2,2-bpy-chloro-2-hydroxy-nicotinate complexes and SiW12O40(4-). Compounds 4 and 5 both contain polyoxometalate supported transition metal complexes, one is a polyoxometalate supported copper-chloro-nicotinate-phenanthroline complex in 4, and the other is a polyoxometalate supported copper-2,2-bpy-chloro-nicotinate complex in 5. It should be noted that nicotinic, isonicotinic and picolinic acids are structural isomers and 2-hydroxy-nicotinic acid is an in situ hydroxylated product of nicotinic acid. In addition, photocatalytic degradation of Rhodamine B (RhB) by compounds 1-5 has been investigated in aqueous solutions.

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《Dalton transactions: An international journal of inorganic chemistry》 |2015年第19期|8971-8983|共13页
作者
Zhao De-Chuan; Hu Yang-Yang; Ding HongGuo Hai-YangCui Xiao-BingZhang XiaoHuo Qi-ShengXu Ji-Qing;
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Jilin Univ, Coll Chem, Changchun 130023, Jilin, Peoples R China;

Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Harbin 150080, Peoples R China;

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正文语种英语
中图分类化学;无机化学;
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Polyoxometalate-based organic-inorganic hybrid compounds containing transition metal mixed-organic-ligand complexes of N-containing and pyridinecarboxylate ligands

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