| Abstract
| - Formation and decay processes of stilbene core radical cation (ST•+) during the photoinduced electron transferhave been studied for a series of stilbene bearing benzyl ether-type dendrons (D). ST•+ and the radical cationof peripheral dendron (D•+) were generated by intermolecular hole transfer from biphenyl radical cation,which was generated from photoinduced electron transfer from biphenyl to the singlet-excited 9,10-dicyanoanthracene in a mixture of acetonitrile and 1,2-dichloroethane (3:1). An intramolecular dimer radicalcation of benzyl groups at the terminal of stilbene dendrimer was indicated as a hole trapping site. Subsequenthole transfer from the trapping site to the core ST generated ST•+. The shielding effects of D depending onthe dendrimer generation on the growth and decay of ST•+ were observed. It was revealed for the first timethat D acts as the hole trapping site and the hole conductor on the way of the exothermic hole transfer fromthe terminal of D to the central core ST. We also found that D inhibits the charge recombination with9,10-dicyanoanthracene radical anion because of the steric hindrance.
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