机构地区: 海南师范大学化学与化工学院
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
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.