原位脱羧制备的配合物(HP_2W_(18)O_(62))(C_6H_6NO_2)_5·2H_2O:结构、光谱及电化学性能(英文)

Complex (HP_2W_(18)O_(62))(C_6H_6NO_2)_5.2H_2O via in-situ Decarboxylation: Crystal Structure,Spectroscopy and Electrochemistry

采用水热法将钨酸钠和浓磷酸与有机配体吡啶-2,6-二羧酸通过原位脱羧制得配合物(HP2W18O62)(C6H6NO2)5.2H2O(1),并用红外光谱、紫外光谱、循环伏安(CV)和X射线单晶衍射等方法进行了表征。分子中的2-吡啶甲酸来源于吡啶-2,6-二羧酸的脱羧反应。化合物1属于单斜晶系,空间群P21/n,晶胞参数分别为:a=1.553 3(2)nm,b=2.006 3(3)nm,c=2.759 9(4)nm,β=103.981(2)°,Z=4,F(000)=8 816。分子间氢键和2-吡啶甲酸与杂多化合物间的弱相互作用使该化合物具有3D超分子结构。CV结果表明,化合物1有四步氧化还原反应。

Heteropolyacid complex （HPzWlsO62）（C6H6NOz）5·2H20 （1） with 2-picolinic acid in deionized water has been synthesized and characterized by IR, UV, cyclic voltammetry （CV） and X-ray single-crystal diffraction methods. The 2-picolinic acid was obtained by decarboxylation of pyridine-2,6-dicarboxylicacid （H2PDA）. The results show that the crystal of the complex 1 belongs to monoclinic system, space group P21/n with： a=1.553 3（2） nm, b=2.006 3（3） nm, c=2.759 9（4） nm, fl=103.981（2）, Z=4, F（000）=8 816. Intermolecular hydrogen-bond and weak interactions from polyanions and 2-picolinic acid lead the complex to a 3D supramolecular architecture. CV study reveals that compound 1 exhibits four chemical processes. CCDC： 905785.