等离子点附近Ni(Ⅱ)-HSA金属中心的结构  

THE STRUCTURAL OF METAL CENTRE IN Ni(Ⅱ)-HSA NEARBY THE ISOIONIC POINT

作　　者：梁宏[1] 罗锦新[1] 闭献树[1] 周永洽[2] 申泮文[2] 

机构地区：[1]广西师范大学化学系 [2]南开大学化学系

出　　处：《广西师范大学学报（自然科学版）》1993年第1期41-46,共6页Journal of Guangxi Normal University:Natural Science Edition

基　　金：国家自然科学基金资助课题

摘　　要：在等离子点附近研究了Ni(Ⅱ)-HSA配合物的紫外光谱,发现:与生理pH时的双金属中心结构不同,在等离子点附近,Ni(Ⅱ)-HSA仅存在一个金属中心,这一金属中心在浓度低于2.5×10^(-4)M时是五配位的四方锥构型,高于这一浓度时是四配位的四方平面构型。这一差异可由pH效应加以解释。The UV spectra of Ni(Ⅱ)-HSA complex nearby the isoionic point have been studied in this paper. It has found that Ni(Ⅱ)-HSA only has one metal centre transformed from a pentacoordinate square-pyramid into a tetracoordinate square-planar configuration as HSA concentration increase over 2. 5×10-4mol·dm-3 nearby by the isoionic point of HSA. But two metal Centres exist in physiological pH. This difference could be explained by pH effect.

关 键 词：LMCT谱带 构型 镍 HSA 络合物 

分 类 号：Q512.1[生物学—生物化学]