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Contrasting Photodynamics between C 60 –Dithiapyrene and C 60 –Pyrene Dyads
Author(s) -
Guldi Dirk M.,
Spänig Fabian,
Kreher David,
Perepichka Igor F.,
van der Pol Cornelia,
Bryce Martin R.,
Ohkubo Kei,
Fukuzumi Shunichi
Publication year - 2007
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/chem.200700837
Subject(s) - microsecond , picosecond , photochemistry , pyrene , ultrafast laser spectroscopy , fluorescence , conjugate , chemistry , acceptor , absorption (acoustics) , excimer , charge (physics) , infrared , materials science , spectroscopy , physics , optics , mathematical analysis , laser , mathematics , organic chemistry , quantum mechanics , composite material , condensed matter physics
The photodynamics of a C 60 –dithiapyrene donor–acceptor conjugate were compared with the corresponding C 60 –pyrene conjugate. The photoinduced charge separation and subsequent charge recombination processes were examined by time‐resolved fluorescence measurements on the picosecond timescale and transient absorption measurements on the picosecond and microsecond timescales with detection in the visible and near‐infrared regions. We have observed quite long lifetimes (i.e., up to 1.01 ns) for the photogenerated charge‐separated state in a C 60 –dithiapyrene dyad without the need for i) a long spacer between the two moieties, or ii) a gain in aromaticity in the radical ion pair.