Keggin型钴取代杂多酸盐PW_(11)O_(39)Co(II)(H_2O)^(5-)的合成与表征  

Synthesis and Characterization of Keggin-type Co-substituted Heteropolycompounds PW_(11)O_(39)Co(II)(H_2O)^(5-)

作　　者：王成龙[1] 彭全明[1] 焦贵省[1] 王旭裕[1] 张红丹[1] 李娜[1] 王崇太[1] 华英杰[1] 

机构地区：[1]海南师范大学化学化工学院,海南海口571158

出　　处：《海南师范大学学报（自然科学版）》2010年第2期172-175,共4页Journal of Hainan Normal University（Natural Science）

基　　金：国家大学生创新项目(091165820)

摘　　要：在中性水溶液中合成了钴取代的磷钨杂多阴离子PW11O39Co(II)(H2O)5-,并进行了红外、紫外可见光谱和循环伏安表征.实验结果表明,PW11O39Co(II)(H2O)5-具有Keggin型杂多离子的结构,在700～1100cm-1的范围内有4个特征振动吸收;在200nm和252nm附近分别有一个紫外吸收带,在400～470nm和470～650nm处分别有一个可见吸收带;除了两对W-O骨架波之外,在1.341V和1.259V处有一对Co(II)/Co(III)的氧化还原波.Cobalt substituted phosphotungstic heteropoly anion PW11O39Co （II）（H2O）^5-was synthesized in neutral aqueous solution, and was characterized by IR, UV-visible spectroscopy and cyclic voltammetry. Experimental results show that PW11O39Co（II）（H2O）^5-has the Keggin structure, showing four characteristic vibrational absorptions within 700～1 100 cm^-1, and two UV absorption bands in the vicinity of 200 nm and 252 nm as well as two visible absorption bands in 400～470 nm and 470～650 nm, respectively. In addition to two pairs of W-O skeleton waves a pair of Co（II）/Co （III） redox wave appears at the potential of 1.341 V and 1.259 V.

关 键 词：Keggin型钴取代杂多阴离子 红外光谱 紫外可见光谱 循环伏安 

分 类 号：O641[理学—物理化学]