若干多氮硒杂环化合物在金表面的自组装及其电化学性质  

Self-assembly monolayers of heterocyclic aromatic selenium compounds on gold surface and their electrochemical characteristic

作　　者：张俊苓[1] 邹家浩[1] 郑文杰[1] 杨芳[1] 白燕[1] 

机构地区：[1]暨南大学化学系,广东广州510632

出　　处：《化学研究与应用》2005年第4期484-487,共4页Chemical Research and Application

基　　金：国家自然科学基金资助项目(20271022);广东省自然科学基金资助项目(010369)

摘　　要：研究了1,2,5-硒二唑并[3,4-b]吡啶(SPb),1,2,5-硒二唑并[3,4-d]嘧啶-7-(5H,6H)酮(SPO),1,2,5-硒二唑并[3,4-d]嘧啶-5,7-(4H,6H)二酮(SPDO)等多氮硒杂环化合物在溶液中及其在金表面的自组装单分子膜的电化学性质。以Fe(CN)63-/4-为离子探针,利用CV法观察了Fe(CN)63-/4-的氧化还原峰的变化。结果表明,在溶液中,电极过程主受吸附控制;自组装膜的电化学信号与其溶液相似,在-600mV左右都有一还原峰,表明该类化合物有相似的组装模式,其中SPO和SPDO在金表面形成了致密的单分子膜,有效地封闭了表面与溶液之间的电子交换和传递。The self-assembly monolayers （SAMs）of heterocyclic aromation selenium compounds such as 1,2,5-selenadiazolo [3,4-b] pyridine （ SPb） ; 1,2,5-selenadiaxzolo [3,4-d] pyrimidine-7-（5H, 6H）-dione （SPO） and5,7-dihydroxy-1,2,5-selenadiazaolo-[3,4-d] pyrimidine （ SPDO） on gold surface were investigated. The results of ectrochemical behavior of the modified electrode and their solutions showed that the electrode process in the solution was mainly controlled by adsorption;the electrochemical characteristics of SAMs were similar with the solution, namely there were reduction peak at-600mV and they had the similar assembly mode. Thereinto, the SAMs of SPO and SPDO on gold surface was densely and steadily formed and hold back the electron transfer between solution and electrode surface.

关 键 词：多氮硒杂环化合物 电化学 自组装单分子膜 修饰金电极 

分 类 号：O646.54[理学—物理化学]