EFFICIENT INTERMOLECULAR ENERGY-TRANSFER BETWEEN POLYSILANES REVEALEDBY TIME-RESOLVED PHOTOLUMINESCENCE

Conventional studies on polysilanes have dealt with molecular structur es on an individual basis and only a few studies have been conducted s o far on the intermolecular interaction between different molecules. I n order to investigate the intermolecular energy transfer process in d etail, time-resolved photoluminescence spectroscopy was carried out ag ainst polydihexylsilane (PDHS), polydiphenylsilane (PDPS) and their mi xture in powder form. Both the intensity and the lifetime of PDHS emis sion decreased, while those of PDPS emission increased in the mixed sa mples. Their mixing-ratio dependence revealed that the resonant energy transfer process from PDHS to PDPS due to multi polar interaction pla yed an important role in light emission characteristics, thus revealin g the possibility of their molecular design as interacting pairs and t heir functional applications.