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Spectroscopy and Photophysics of a Highly Nonplanar Expanded Porphyrin: 4,9,13,18,22,27‐Hexaethyl‐5,8,14,17,23,26‐hexamethyl‐2,11,20‐triphenylrosarin
Author(s) -
Lament B.,
Dobkowski J.,
Sessler J. L.,
Weghorn S. J.,
Waluk J.
Publication year - 1999
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/(sici)1521-3765(19991001)5:10<3039::aid-chem3039>3.0.co;2-3
Subject(s) - porphyrin , protonation , chemistry , photochemistry , alkyl , absorption spectroscopy , spectroscopy , molecular orbital , excitation , atomic orbital , molecule , computational chemistry , electron , physics , organic chemistry , optics , ion , quantum mechanics
Nonplanarity and conformational flexibility of alkyl‐ and phenyl‐substituted rosarin (see diagram) determine its photophysical properties. Both neutral and protonated forms are nonfluorescent. Upon excitation, rapid deactivation occurs by internal conversion to the ground state. Six molecular orbitals have to be taken into account to explain the absorption spectral pattern.