Spectroelectrochemical Study of Mediators I. Bipyridylium Salts and Their Electron Transfer Rates to Cytochrome c

Wiley - Tập 78 Số 3 - Trang 253-259 - 1974
Eberhard Steckhan1, Theodore Kuwana1
1Department of Chemistry, Ohio State University, Columbus, Ohio 43210

Tóm tắt

AbstractIn many potentiometric titrations of biological electron transfer components, mediators are often employed to act as electron transfer mediators between the components and the potentiometric electrode. Certain mediators have been employed recently as electrogenerated titrants of components in coulometric titrations, particularly in some spectroelectrochemical studies. In this paper, the optical and electrochemical characteristics of some bipyridylium salts are examined as mediator‐titrants. These salts (dications) undergo a reversible one electron reduction to the radical cation which can be a good reductant. Spectroelectrochemistry has also been applied to the evaluation of the rate of electron transfer from the radical to oxidized cytochrome c. The results reported herein are a part of our interest in evaluating the electron transfer properties of heme proteins found in the mammalian respiratory system.

Từ khóa


Tài liệu tham khảo

Rodkey F. L., 1959, J. biol. Chemistry, 234, 677, 10.1016/S0021-9258(18)70268-8

10.1016/0003-9861(68)90667-X

10.1021/ar50055a002

10.1016/S0022-0728(71)80144-4

10.1016/0006-291X(72)90001-0

10.1016/0006-291X(73)91329-6

10.1021/ac60329a038

Sutin N., 1972, Chem. Brit., 8, 148

10.1073/pnas.70.6.1701

10.1135/cccc19683044

Boon W. R., Chem. Ind. [London], 1965, 782

10.1021/ac60297a022

10.1021/ac60291a007

Homer R. F., J. chem. Soc. [London], 1960, 2498

10.1021/ja00704a051

Adams R. N., 1969, Electrochemistry at Solid Electrodes, 155

10.1016/0022-0728(67)80095-0

10.1021/ac60320a012

M.FujihiraandT.Kuwana unpublished data.

Leninger A., 1970, Biochemistry

Takano T., 1972, Cold Springs Harbor Symposium on Quantitative Biology

10.1021/ja00778a042

Feldberg S. W., 1969, Electroanalytical Chemistry

M.FujihiraandT.Kuwana Manuscript submitted for publication.

10.1135/cccc19692037

10.1002/jlac.197319730220

10.1085/jgp.16.6.859

Thông tin
Thông tin xuất bản

Wiley

Tập 78 Số 3

253-259

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