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Polarographische und voltammetrische Untersuchungen an symmetrischen Methin‐, Azamethin‐ und Phosphamethincyaninen in Acetonitril
Author(s) -
Hellrung Bruno
Publication year - 1984
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19840670318
Subject(s) - chemistry , polarography , acetonitrile , cyclic voltammetry , electrode , voltammetry , reduction (mathematics) , redox , electrochemistry , inorganic chemistry , chromatography , geometry , mathematics
Polarographic Investigations on Symmetrical Methine‐, Azamethine‐, and Phosphamethinecyanine dyes in Acetonitrile Solution The reduction and oxidation behaviour of six symmetrical methine‐, azamethine‐, and phosphamethine dyes with different heterocycles in MeCN solutions has been investigated by menas of dc‐ and ac‐polarography (DME, MDE and rotating Pt‐electrode) and cyclic triangular wave voltammetry. The reduction and oxidation mechanism has been found to be of the type ec with the reduction and oxidation step being reversible to irreversible. Reduction and oxidation potentials, transfer coefficients, and specific currents have been measured and compared with known properties of methinecyanines, carbocyanines, and triazacarhocyanines.