Contrasting photodynamics between C60-dithiapyrene and C60-pyrene dyads.
The photodynamics of a C60-dithiapyrene donor-acceptor conjugate were compared with the corresponding C60-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 C60-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.
Guldi
Dirk M
DM
Institute for Physical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany. dirk.guldi@chemie.uni-erlangen.de
Spänig
Fabian
F
Kreher
David
D
Perepichka
Igor F
IF
van der Pol
Cornelia
C
Bryce
Martin R
MR
Ohkubo
Kei
K
Fukuzumi
Shunichi
S