12硫醇修饰金电极K_3Fe(CN)_6/K_4Fe(CN)_6体系的电化学参数  

Electrochemical Param eters of Fe(CN)_6^(3-) /Fe(CN)_6^(4-) at the Gold Electrode Modified with Dodecylthiol

作　　者：崔晓丽[1,2] 蒋殿录[3] 刁鹏[1,2] 李俊新[3] 童汝亭[3] 王心葵[1] 

机构地区：[1]中国科学院山西煤炭化学研究所 [2]河北师范大学化学系,河北石家庄050016 [3]河北师范大学化学系

出　　处：《河北师范大学学报（自然科学版）》1999年第4期504-507,515,共5页Journal of Hebei Normal University：Natural Science

基　　金：河北省自然科学基金!(298159)

摘　　要：采用自组装(SA)技术制备了正十二硫醇的SA 单分子层膜.应用电化学交流阻抗及循环伏安技术研究了12 硫醇SA 单分子层膜在K3Fe(CN)6/K4Fe(CN)6 溶液中的电化学行为.测得了表观电子传递系数α+ β≠1,电子隧穿系数为(0.83～1.11)/CH2.The electrochem istry behaviors of different concentration of Fe(CN)3-6 / Fe(CN)64- at the gold electrode m odified w ith dodecylthiol self-assem bled m onolayer w ere investigated w ith electrochem icalim pedance spectroscopy and cyclic voltam m etry technology.It is determ ined that the apparent heterogeneous rate constant ks is in the order of10- 8 m ·s- 1.Itisfound theapparenttransfercoefficientsα+ β≠1.Theelectron transfer between the gold surface and the redox species separated by the m onolayer assem bly m ay com plete by electron tunneling. The electron tunneling constant is estim ated in the range of(0.83～1.11)/CH2 w hich isconsistentwith literatures.

关 键 词：十二烷基硫醇 单分子层膜 SA 金电极 电化学参数 

分 类 号：O657.13[理学—分析化学]