Time resolved high resolution absorption and fluorescence spectra of 1,2,5,6-dibenzanthracene in PMMA


Bayrakçeken F., Güney M.

Asian Journal of Spectroscopy, vol.15, no.1-4, pp.17-20, 2011 (Refereed Journals of Other Institutions) identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 1-4
  • Publication Date: 2011
  • Title of Journal : Asian Journal of Spectroscopy
  • Page Numbers: pp.17-20
  • Keywords: 1,2,5,6-Dibenzanthracene in pmma, Absorption spectrum, Fluorescence spectrum, Time resolved high resolution spectra

Abstract

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.