Probing the influence O2 on photoinduced reversible electron transfer in perylenediimide-triphenylamine-based dendrimers by single-molecule spectroscopy
dendrimers;
electron transfer;
fluorescence;
spectroscopy;
oxygen;
single-molecule studies;
D O I:
10.1002/anie.200460560
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
The dynamics of reversible photoinduced electron transfer in individual perylene-diimide-triphenylamine-based donor-acceptor dendrimers immobilized in polystyrene were investigated by single-molecule spectroscopy. By changing the local concentration of oxygen, it was possible to influence the transition of the charge-separation state (CSS) either to the locally excited state (LES) or to the ground state (CS, see graphic).