铜(Ⅱ)与明胶络合反应的酸效应研究  

STUDY ON THE ACID EFFECT OF COPPER (Ⅱ) WITH GELATIN REACTION

作　　者：唐世华 

机构地区：[1]驻马店师范高等专科学校化学系,河南驻马店463000

出　　处：《感光科学与光化学》2000年第4期323-328,共6页Photographic Science and Photochemistry

基　　金：河南省教委重点科研规划项目! (9715 0 0 2 2 )

摘　　要：本文利用分光光度法 ,测定了 pH值为 8 0～ 1 3 0时 ,Cu2 +与明胶的络合比 .结果发现 ,随溶液 pH值的增大 ,其络合比增加 .这是因为在该 pH值范围内 ,明胶发生去质子化作用而带负电 ,提供了更多的NH2 —和COO- .通过络合物的荧光光谱表明 ,由于Cu2 +与明胶分子的强烈络合作用 ,使得Cu2 +成为明胶有效的荧光猝灭剂 .The ratio of chelates of Cu 2+ with gelatin in pH value range between 8.0 to 13.0 is determined by spectrophotometry. Result shows that the ratio increases with increasing pH value. Because the protons are removed from the gelatin molecule in this pH value range. The gelatin molecule provides many amino groups and carboxyl ions. Therefore the Cu 2+ is a effective fluorsescence quenching agent due to a strong chelation between Cu 2+ and gelatin molecule.

关 键 词：明胶 铜离子 络合比 荧光光谱 酸效应 络合反应 

分 类 号：TQ571[化学工程—精细化工]