Abstract
A new bichromophoric compound, diethyl 2-(9-anthrylmethyl)-2-( p- N, N-dimethylaminobenzyl)malonate ( 1), was prepared by condensation of diethyl 2-( p- N, N-dimethylaminobenzyl)malonate with 9-chloromethyl anthracene. The corresponding model compound, diethyl 2-(2-anthryl methyl)malonate ( 2), was synthesized by condensation of diethyl malonate with 9-chloromethylanthracene. Exciplex formation was observed both in fluid media and a polymer matrix. The relative exciplex fluorescence intensity in the polymer matrix was strongly dependent on the concentration of compound 1, suggesting intermolecular exciplex formation of 1 in the polymer matrix at concentrations above 10 −3 M. Exciplex formation in fluid media was independent of concentration. The exciplex emission of 1 in the polymer matrix was considerably shifted towards shorter wavelengths (by about 30 nm) as compared with the maximum wavelength of exciplex emission measured in fluid media; this indicates that the interaction between chromophores is enhanced in a solid matrix.
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