新的双钒帽Keggin型多金属氧酸盐衍生物的合成与表征

Synthesis and characterization of two new bicapped Keggin polyoxometalate derivatives

用预先制备的砷钼酸锂做原料,在水热条件下合成了两种As为杂原子的Keggin型杂多酸衍生物[M(phen)3]2[AsMo12O40(VO)2].nH2O(M=Co,n=1,化合物1;M=Zn,n=0.5,化合物2;phen=1,10-phenanthroline).单晶X射线衍射解析说明化合物1和2是同构的,属于三斜晶系,空间群为Pī,它们由离散的[AsMo12O40(VO)2]4-阴离子和[M(phen)3]2+抗衡阳离子组成.另外将化合物1修饰到电极上,制备了本体修饰碳糊电极,并研究了其电化学行为.

Two new bicapped Keggin polyoxometalate（POM）-based inorganic-organic hybrids：[M（phen）3]2[AsMo12O40（VO）2]·nH2O（M=Co,n=1,1,M=Zn,n=0.5,2,phen=1,10-phenanthroline）,have been synthesized under hydrothermal conditions by directly using Li3[AsMo12O40]·nH2O as starting materials.Single-crystal X-ray analysis revealed that compounds 1 and 2 were isostructural,consisting of discrete bicapped Keggin POM anions [AsMo12O40（VO）2] and counter cations [M（phen）3]2＋.Other characterizations by elemental analysis,IR spectra and TG analyses were also supported the structural analyses.The electrochemical property of compound 1 exhibits three two-electron reversible redox processes.