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Photoinduced electron transfer in porphyrin‐quinone cyclophanes, 7. Porphyrin‐quinone cyclophanes with gradually varied acceptor strength: Physical properties related to electron transfer
Author(s) -
Staab Heinz A.,
Voit Guido,
Weiser Jürgen,
Futscher Michael
Publication year - 1992
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19921251018
Subject(s) - chemistry , porphyrin , quinone , photochemistry , intramolecular force , electron transfer , electron acceptor , photoinduced electron transfer , quenching (fluorescence) , cyclophane , acceptor , fluorescence , crystallography , stereochemistry , crystal structure , physics , quantum mechanics , condensed matter physics
Absorption and emission spectra of the doubly quinone‐bridged porphyrin cyclophanes 1–4 with gradually varied acceptor strength as well as of the single‐bridged analogues 5–9 and 10–13 are reported. Reduction and oxidation potentials of these intramolecular porphyrin‐quinone systems have been determined. Based on these data, fluorescence quenching as well as time‐resolved fluorescence lifetime measurements are discussed in terms of photoinduced electron transfer to the charge‐separated zwitterionic state.