Keggin型PW_(11)O_(39)Mn(II)(H_2O)^(5+)的合成、表征及电化学性质  

Synthesis, Characterization and Electrochemical Properties of Keggin-type Mn-substituted Heteropolyanion PW_(11)O_(39)Mn(II)(H_2O)^(5+)

作　　者：张红丹[1] 李娜[1] 焦贵省[1] 王旭裕[1] 王成龙[1] 彭全明[1] 华英杰[1] 王崇太[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176-180,共5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Keggin型锰取代磷钨杂多阴离子PW11O39Mn(II)(H2O)5-,并进行了IR、UV-vis和循环伏安表征.实验结果表明,PW11O39Mn(II)(H2O)5-在700～1100cm-1的指纹区内有5个特征振动吸收峰,分别对应于P-Oa、W=Od、W-Ob-W和W-Oc-W的反对称伸缩振动吸收,其中P-Oa的振动吸收分裂成2个峰.在200nm和252nm处有两个很强的紫外吸收;在400～700nm的可见光区有一个连续的吸收带.在循环伏安图中除了2对W-O骨架波之外,还有两对Mn的氧化-还原波,其电化学性质与溶液的pH有关.Keggin-type Mn （II）-substituted heteropolyanion PW11O39Mn （II）（H2O）^5-was synthesized in neutral aqueous solution and characterized by IR, UV-vis and cyclic voltammetry. Experimental results showed that in the 700-1100 cm-1 fingerprint area PW11O39Mn （II）（H2O）^5-exhibits five characteristic absorption peaks, corresponding to the anti-symmetric stretching vibration of P-Oa,W = Od,W-Ob-W and W-Oc-W, respectively, in which the vibration absorption of P-Oa splits into two peaks. PW11O39Mn （II）（H2O）^5-has two strong UV absorptions at near 200 nm and 252 nm and a continuous visible absorption band in the district of 400～700 nm. In addition to two pairs of W-O skeleton-waves, two pairs of Mn redox waves appear in the cyclic voltammograms. The electrochemical properties of the two pairs of Mnwaves are related to the solution pH.

关 键 词：锰取代磷钨杂多阴离子 红外光谱 紫外可见光谱 循环伏安 

分 类 号：O64[理学—物理化学]