Synthesis, Characterization and Properties of Two Novel Complexes Based on 2-Aminopyridine and Polyoxometalates  

作　　者：龚云 李阳光 李晖 王永惠 胡长文 

机构地区：[1]Department of Chemistry, Beijing Institute of Technology, Beijing 100081, China [2]Department of Chemistry, Chongqing University, Chongqing 400044, China [3]Institute of Polyoxometalates Chemistry, Northeast Normal University, Changchun, Jinlin 130024, China

出　　处：《Chinese Journal of Chemistry》2006年第9期1148-1153,共6页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Nos. 20271007. 20331010 and 90406002） and the Specialized Research Fund for the Doctoral Program of Higher Education of China （No. 20030007014）. Dedicated to Professor Xikui Jiang on the occasion of his 80th birthday.

摘　　要：Two novel complexes based on 2-aminopyridine and polyoxometalates （POMs） formulated as （C5H7N2）6- [PMo11^ⅤMo^ⅥO40（V^ⅥO）4]·H2O （1） and （C5H7N2）16[P2W18O61.5]2 （2） were hydrothermally synthesized and structurally characterized by elemental analysis, ICP, IR, UV-Vis, TG, ESR and single crystal X-ray diffraction methods. Complex 1 consists of a novel tetra-capped Keggin POMs, [PMo11^ⅤMo^ⅥO40（V^ⅣO）4]^6-, in which four [V^ⅣO5] square pyramids cap the equatorial positions of Keggin core [PMo11^ⅤMo^ⅥO40]^14-, linked together with six protohated 2-aminopyridine via hydrogen bonding interactions. Dawson and lacunary Dawson POMs, [P2W18O62]^6- and [P2W17O61]^10- coexist in complex 2, they link together with sixteen protonated 2-aminopyridine via hydrogen bonding interactions. Complex 2 exhibits photochromic property.Two novel complexes based on 2-aminopyridine and polyoxometalates （POMs） formulated as （C5H7N2）6- [PMo11^ⅤMo^ⅥO40（V^ⅥO）4]·H2O （1） and （C5H7N2）16[P2W18O61.5]2 （2） were hydrothermally synthesized and structurally characterized by elemental analysis, ICP, IR, UV-Vis, TG, ESR and single crystal X-ray diffraction methods. Complex 1 consists of a novel tetra-capped Keggin POMs, [PMo11^ⅤMo^ⅥO40（V^ⅣO）4]^6-, in which four [V^ⅣO5] square pyramids cap the equatorial positions of Keggin core [PMo11^ⅤMo^ⅥO40]^14-, linked together with six protohated 2-aminopyridine via hydrogen bonding interactions. Dawson and lacunary Dawson POMs, [P2W18O62]^6- and [P2W17O61]^10- coexist in complex 2, they link together with sixteen protonated 2-aminopyridine via hydrogen bonding interactions. Complex 2 exhibits photochromic property.

关 键 词：POLYOXOMETALATE tetra-capped Keggin DAWSON lanuary Dawson PHOTOCHROMISM 

分 类 号：O626.32[理学—有机化学]