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Electrochemistry at the tetrathiafulvalene‐tetracyanoquinodimethane electrodes. Application to the study of c‐type cytochromes
Author(s) -
Bianco Pierre,
Haladjian Jean
Publication year - 1996
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140080218
Subject(s) - tetracyanoquinodimethane , tetrathiafulvalene , electrochemistry , electrode , redox , cytochrome c , inorganic chemistry , chemistry , materials science , organic chemistry , molecule , biochemistry , mitochondrion
Electrodes made from pastes of the conducting organic salt, tetrathiafulvalene‐tetracyanoquinodimethane (TTF‐TCNQ), are prepared and characterized using electrochemical techniques. These electrodes behave as conventional solid electrodes within their stable potential range. An attractive property is their capability to achieve direct electrochemistry of c‐type cytochromes (horse heart cytochrome c, cytochrome c 552 from Thiobacillus ferrooxidans). Resuits on pH‐dependence and kinetic data for these metalloproteins agree with previously published data. It is suggested that favorable interactions occur between the TTF‐TCNQ electrode surface and redox protein sites. Moreover, the analytical advantage of using permselective‐membrane TTF‐TCNQ electrode is demonstrated.