The formation and decay kinetics of fluorescence spectra of triethylamine (TEA) exciplexes with naphthalene and 1-naphthalyl derivatives were investigated in cyclohexane. The stability of the singlet exciplexes was shown to determine the kinetics. The loosely bound exciplexes between TEA and naphthalene or 1-methylnaphthalene were formed in reversible processes, while the tightly bound complexes of TEA with 1-naphthyl-N-methyl-carbamate or with 1-naphthyl-acetate were the product of irreversible reactions of the singlet excited aromatic acceptor with the ground state aliphatic amine molecules. The increases electron affinity of the carbamate and acetate derivatives promoted the formation of ground state complexes and made possible a second route of exciplex formation. Evaluation of the time-resolved fluorescence results supplied the room temperature rate coefficients for the elementary steps.
|Number of pages||12|
|Journal||Journal of Photochemistry and Photobiology, A: Chemistry|
|Publication status||Published - Aug 1989|
ASJC Scopus subject areas
- Chemical Engineering(all)
- Physics and Astronomy(all)