Synthesis and conductivity of substituted heteropoly acid with Dawson structure H_7[Ga(H_2O)P_2W_(17)O_(61)].18H_2O  

作　　者：QIAN XueYu HE ZhiQi WU QingYin TONG Xia YAN WenFu GONG Jian 

机构地区：[1]Department of Chemistry, Zhejiang University, Hangzhou 310027, China [2]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China [3]Key Laboratory of Polyoxometalate Science of the Ministry of Education, Northeast Normal University, Changchun 130024, China

出　　处：《Chinese Science Bulletin》2011年第22期2327-2330,共4页

基　　金：supported by the National Natural Science Foundation of China(21071124);the Natural Science Foundation of Zhejiang Province(Y4090183);the Foundation of State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of Jilin University(2010-16);the Foundation of Key Lab of Polyoxometalates Science of the Ministry of Education of Northeast Normal University(DS-20080102)

摘　　要：A new solid high-proton conductor,H7[Ga(H2O)P2W17O61].18H2O,a substituted heteropoly acid with Dawson structure,has been synthesized by the degradation/ion-exchange/freezing method.The product was characterized by potentiometric titration,chemical analysis,IR,UV,XRD and TG-DTA.Complex impedance measurements show a high conductivity(5.44×10-3 S/cm at 50℃),with an activation energy for proton conduction of 36.04 kJ/mol.The mechanism of proton conduction is the Vehicle mechanism.A new solid high-proton conductor, H7[Ga（H2O）P2W17O61]·18H2O, a substituted heteropoly acid with Dawson structure, has been synthesized by the degradation/ion-exchange/freezing method. The product was characterized by potentiometric titration, chemical analysis, IR, UV, XRD and TG-DTA. Complex impedance measurements show a high conductivity （5.44×10^-3 S/cm at 50℃）, with an activation energy for proton conduction of 36.04 kJ/mol. The mechanism of proton conduction is the Vehicle mechanism.

关 键 词：DAWSON结构 杂多酸 H2O 高导电 合成 质子导体 传导机制 电位滴定法 

分 类 号：O641.4[理学—物理化学] O643.1[理学—化学]