TY - JOUR
T1 - Simple methods for preparation of a well-defined 4-pyridinethiol modified surface on Au(111) electrodes for cytochrome c electrochemistry
AU - Taniguchi, Isao
AU - Yoshimoto, Soichiro
AU - Yoshida, Masahito
AU - Kobayashi, Shun ichi
AU - Miyawaki, Toshifumi
AU - Aono, Yutaka
AU - Sunatsuki, Yukinari
AU - Taira, Hideo
N1 - Funding Information:
The authors appreciate Professor Masatoshi Osawa of Catalysis Research Center of Hokkaido University for his helpful suggestions on SEIRAS. Partial financial support of this work by a Grant-in-Aid from the Ministry of Education, Science, Sports and Culture, Japan (No. 08455399), the Scientific Research on Priority Area of Electrochemistry of Ordered Interfaces (No. 09237106), and the Program for Promotion of Basic Research Activities for Innovative Biosciences (BRAIN) are gratefully acknowledged.
PY - 2000/6/9
Y1 - 2000/6/9
N2 - A very small amount of sulfide impurity in 4-pyridinethiol (4-PySH) modifier solution was found to interfere with the proper formation of the 4-PySH modified surface for cytochrome c electrochemistry on an Au(111) electrode. When the modification was conducted in an alkaline (e.g. 0.1 M KOH) solution, in aqueous solutions under applying a potential more positive than 0.3 V vs. Ag/AgCl, or at a low modifier concentration (e.g. 20 μM), the proper 4-PySH modified surface was obtained even using 4-PySH as received, which contained a small amount of sulfide. The selective adsorption of 4-PySH in the presence of a small amount of sulfide under these conditions was due to the rapid formation of proper 4-PySH modified surface, which prevented the sulfide from reacting with the electrode surface.
AB - A very small amount of sulfide impurity in 4-pyridinethiol (4-PySH) modifier solution was found to interfere with the proper formation of the 4-PySH modified surface for cytochrome c electrochemistry on an Au(111) electrode. When the modification was conducted in an alkaline (e.g. 0.1 M KOH) solution, in aqueous solutions under applying a potential more positive than 0.3 V vs. Ag/AgCl, or at a low modifier concentration (e.g. 20 μM), the proper 4-PySH modified surface was obtained even using 4-PySH as received, which contained a small amount of sulfide. The selective adsorption of 4-PySH in the presence of a small amount of sulfide under these conditions was due to the rapid formation of proper 4-PySH modified surface, which prevented the sulfide from reacting with the electrode surface.
UR - http://www.scopus.com/inward/record.url?scp=0033708017&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0033708017&partnerID=8YFLogxK
U2 - 10.1016/S0013-4686(00)00358-3
DO - 10.1016/S0013-4686(00)00358-3
M3 - Article
AN - SCOPUS:0033708017
VL - 45
SP - 2843
EP - 2853
JO - Electrochimica Acta
JF - Electrochimica Acta
SN - 0013-4686
IS - 18
ER -