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Phenothiazinyl‐Substituted Cyanines: Model Compounds for Molecular Switches
Author(s) -
Ehmann Agnes,
Gompper Rudolf,
Hartmann Horst,
Müller Thomas J. J.,
Polborn Kurt,
Schütz Reiner
Publication year - 1994
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.199405721
Subject(s) - phenothiazine , dication , moiety , photochemistry , chemistry , conjugated system , arylene , stereochemistry , molecule , organic chemistry , aryl , pharmacology , polymer , medicine , alkyl
Almost orthogonal to the vinamidinium system , the phenothiazine unit in salts of type 1 is electronically “disconnected” from the conjugated system. By flash excitation of 1 an electron is transferred from the phenothiazine to the vinamidinium moiety, which gives rise to a relatively long‐lived T 1 state, most likely corresponding to the radical dication in 2 . Compounds of type 1 are thus models for a molecular switch. X − = BF 4 − , ClO 4 − .