Research Information System
Asian Journal of Spectroscopy, vol.15, no.1-4, pp.17-20, 2011 (Peer-Reviewed Journal)
High resolution, S0-→ Sn and S n-→ S0 electronic absorption and prompt fluorescence of 1,2,5,6-dibenzanthracene in polymethylmethacrylate were experimentally observed by flash and laser flash photolysis technique. In the first step, an excited singlet state is created by nanosecond optical pumping system, then electronically excited molecule returns to the ground state by emitting high resolution prompt fluorescence at the room temperature. The decay time of S 1 state was measured by laser flash photolysis system, and found to be 12±1 nsec.