过渡金属钨硅杂多酸盐合成及酸性研究  

Synthesis and Activity of Heteropolysilicotungstate Containing Transition Metal Elements

作　　者：吴志芸[1] 王俊[1] 赵仲清[1] 

机构地区：[1]吉林大学化学系,长春130023

出　　处：《高等学校化学学报》1993年第1期16-18,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金

摘　　要：钨磷、钨硅杂多酸及其盐是重要的酸催化剂,它们都含有B酸中心,它来源于结构内质子、阳离子电场中结晶水离解出的质子,可在还原金属离子（如Ag+）过程中释放出H+。也有杂多酸（盐）含有L酸的报道,认为它来源于易于接受电子对的抗衡金属阳离子,如AlPW12O40中的Al3+。The heteropolysilicotungstates containing transition metal elements Mn2+, Co2+ and Ni2+ were synthesized. IR spectra and TPD of the samples adsorbing pyrMine were determined. The IR spectra of the heteropoly compounds are different from those of 12-silicotungtic acid and its potassium salt; the adsorption peak at 1438 cm-1 is visible, even if the sample was treated for 1 h at 200℃ under 0. 5 Pa vacuum. The result implies that Lewis acid site exists in the compound. The acid site corresponds to the medium temperature peak on TPD pattern of the compoud adsorbing pyridine.

关 键 词：钨 硅 杂多化合物 酸性 过渡元素 

分 类 号：O614.613[理学—无机化学]