Photophysical processes of 1,3-dicarbazolypropane

The photophysical processes of 1,3-dicarbazolypropane (DCZP), which possess es two fluorogen, carbazoly, and one carbonic chain composed of three carbo n atoms, were studied. The formation of intermolecular excimer, intramolecu lar excimer and triple exciplexes have been investigated in the system of D CZP and 1,4-dinitrilebenzene DNB) with steady state fluorescence spectrosco py. The experimental results show that with the addition of DNB into the lo wer concentration solution of DCZP in benzene, the fluorescence of intramol ecular excimer of DCZP, (D-D)*, is quenched while the ((D-D)A)* type triple exciplex (one molecule of DCZP with one molecule of DNB) is formed and wit h the addition of DNB into higher concentration solution of DCZP, the forma tion of (DDA)* type triple exciplex (two molecules of DCZP with one molecul e of DNB) is also confirmed. (C) 2001 Elsevier Science B.V. All rights rese rved.