两种四苯基卟啉衍生物的表观质子化常数测定  

Determination of over-all protonation constants for two tetraphenylporphyrin derivatives

作　　者：吴继魁[1] 王麟生[2] 

机构地区：[1]上海水产大学食品学院,上海200090 [2]华东师范大学化学系,上海200062

出　　处：《上海水产大学学报》2007年第5期466-469,共4页Journal of Shanghai Fisheries University

基　　金：上海水产大学优秀青年教师跟踪项目(6690206044)

摘　　要：卟啉类试剂质子化常数的测定对于研究其显色性能有着重要的意义。用光度法测得两种四苯基卟啉衍生物的表观质子化常数,探讨了取代基的电子效应与空间位阻效应对表观质子化常数的影响。取代基三氟甲基的间位引入降低了两种四苯基卟啉衍生物的表观质子化常数,与四苯基卟啉相比其显色灵敏度稍微降低,但增强了其空间位阻效应,在显色研究中有望提高其选择性。It is very important to determine the protonation constants of tetraphenylporphyrin derivatives for studying their colorful performance. The over-all protonation constants of two tetraphenylporphyrin derivatives were determined by spectrophotometric methods. The influence of electron effect and steric hindrance of substituting group on overall protonation constants was discussed. With chromophore introduced, it is expected to enhance the selectivity of tetraphenylporphyrin derivatives reagents.

关 键 词：卟啉 质子化常数 紫外吸收光谱 空间效应 

分 类 号：O642.5[理学—物理化学]