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Synthesis, Spectroscopy, and Semiempirical Study of a Novel Porphyrin–Flavin Dyad
Author(s) -
Hermann Dominik T.,
Schindler Anne Christina,
Polborn Kurt,
Gompper Rudolf,
Stark Susanne,
Parusel Andreas B. J.,
Grabner Gottfried,
Köhler Gottfried
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(19991105)5:11<3208::aid-chem3208>3.0.co;2-o
Subject(s) - porphyrin , photochemistry , flavin group , singlet state , acceptor , chemistry , dyad , spectroscopy , amidine , population , computational chemistry , excited state , stereochemistry , physics , atomic physics , organic chemistry , demography , quantum mechanics , sociology , acoustics , enzyme , condensed matter physics
Potential photosynthetic models , porphyrin dyads with various acceptors, that are separated by a diazaphenylene spacer, are synthesized by a new strategy. The amidine and vinamidinium salts are coupled by pyrimidine rings. In one example ( n =1 in the figure), excitation of a flavin acceptor results in energy transfer to the porphyrin singlet (≈60 %) and population of a charge‐separated state (≈40 %), which relaxes to the ground state on a subnanosecond time scale.