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The fluorescence lifetimes and emission spectra of 1,1’-BIN and some other compounds in different solvents, which should give some information concerning the conformational changes of 1,1’-BIN in the excited singlet state have been examined. The excited charge transfer properties of 1,1’-BIN have been examined as well. The results indicate that the two naphthyls in the excited binaphthyl molecule rotate around the connecting C—C bond very fast at room temperature in a fluid solvent since it occurs even in viscous solvents within 280 ps and that there is an exciplex formed between 1,1’-BIN and PDMP. The decay function of 1,1’-BIN is obtained.
The fluorescence lifetimes and emission spectra of 1,1’-BIN and some other compounds in different solvents, which should give some information concerning the conformational changes of 1,1’-BIN in the excited singlet state have been examined. The excited charge transfer properties of 1,1’-BIN have been examined as well. The results indicate that the two naphthyls in the excited binaphthyl molecule rotate around the connecting C-C bond very fast at room temperature in a fluid solvent since it occurred even in viscous solvents within 280 ps and that there is an exciplex formed between 1,1’-BIN and PDMP. The decay function of 1,1’-BIN is obtained.