Efficient intermolecular energy transfer between soluble polysilanes

We observed an intermolecular energy transfer from polydihexylsilane (PDHS) to poly bis(p-propoxyphenyl)silane (PBPPS) in both PDHS/PBPPS double layer and blend films by utilizing photoluminescence (PL) spectroscopy for the f irst time. Decrease in the intensity of PDHS emission and increase in that of PBPPS emission occurred in the PDHS/PBPPS double layer film. In case of the PDHS/PBPPS blend film, unusual conformational change in the backbone of PDHS was observed due to the co-existence of PBPPS molecules. The PL excit ation spectra and time resolved PL measurement indicate that the resonant e nergy transfer process dominates the entire transfer process. (C) 2000 Else vier Science B.V. All rights reserved.