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π‐Dimers of End‐Capped Oligopyrrole Cation Radicals
Author(s) -
van Haare J. A. E. H.,
Groenendaal L.,
Havinga E. E.,
Janssen R. A. J.,
Meijer E. W.
Publication year - 1996
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199606381
Subject(s) - radical , chemistry , photochemistry , diamagnetism , radical ion , ion , organic chemistry , physics , quantum mechanics , magnetic field
In two consecutive one‐electron oxidations , oligopyrroles substituted with phenyl capping groups (PhPy n Ph, n = 2–4) can be oxidized reversibly to give stable cation radicals and dications. Spectroelectrochemical studies give direct evidence that diamagnetic π‐dimers of cation radicals are formed in solution. Such dimers may be involved as charge carriers in conducting polypyrrole.