TY - JOUR
T1 - Kinetic study on the dimerization reaction of 9-methoxyanthracene cation radical by means of fast scan cyclic voltammetry
AU - Nozaki, Koichi
AU - Oyama, Munetaka
AU - Hatano, Hiroyuki
AU - Okazaki, Satoshi
N1 - Funding Information:
The authors express their gratitude to Dr. Katsuo Takahashi (Riken Institute of Physical and Chemical Research, Wako) and Mr. Masakatsu Karatsu (Fuso Co., Ltd, Kawasaki) for their continuing interest and for providing facilities for the rapid response potentiostat during this work. This work was supported in part by a Grant-in-Aid for Scientific Research, No. 61540421,f rom the Ministry of Education and Culture. Japan.
PY - 1989/10/10
Y1 - 1989/10/10
N2 - The instrumentation of a fast scan cyclic voltammetric (FSCV) system with a maximum scan rate of 300 kV s and its application to the kinetic studies of very short-lived electrogenerated intermediates are presented. The time resolution of the system was inspected by cyclic voltammetry and chronoamperometry, and was found to be better than 1 μs at an ultramicrodisk electrode (UMDE) of micrometre size. The mechanism and kinetics of the very rapid anodic dimerization of 9-methoxyanthracene (9MeOA) are discussed in further detail for the first time by means of FSCV. The reductive wave of 9MeOA cation radical was detected successfully, although the reversible cyclic voltammogram could not be observed even at a scan rate as high as 300 kV s. It was concluded, from the dependences of the anodic peak potentials on both the scan rate and the substrate concentration, that the dimerization proceeded via coupling of 9MeOA cation radical with the substrate. The dimerization rate constant was estimated to be (3.5± 0.5) × 108 M-1 s-1 from the results of digital simulation analysis of the observed fast scan cyclic voltammograms.
AB - The instrumentation of a fast scan cyclic voltammetric (FSCV) system with a maximum scan rate of 300 kV s and its application to the kinetic studies of very short-lived electrogenerated intermediates are presented. The time resolution of the system was inspected by cyclic voltammetry and chronoamperometry, and was found to be better than 1 μs at an ultramicrodisk electrode (UMDE) of micrometre size. The mechanism and kinetics of the very rapid anodic dimerization of 9-methoxyanthracene (9MeOA) are discussed in further detail for the first time by means of FSCV. The reductive wave of 9MeOA cation radical was detected successfully, although the reversible cyclic voltammogram could not be observed even at a scan rate as high as 300 kV s. It was concluded, from the dependences of the anodic peak potentials on both the scan rate and the substrate concentration, that the dimerization proceeded via coupling of 9MeOA cation radical with the substrate. The dimerization rate constant was estimated to be (3.5± 0.5) × 108 M-1 s-1 from the results of digital simulation analysis of the observed fast scan cyclic voltammograms.
UR - http://www.scopus.com/inward/record.url?scp=0000000563&partnerID=8YFLogxK
U2 - 10.1016/0022-0728(89)85036-3
DO - 10.1016/0022-0728(89)85036-3
M3 - 学術論文
AN - SCOPUS:0000000563
SN - 0022-0728
VL - 270
SP - 191
EP - 204
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1-2
ER -