Vol. 12 No. 1 (2013): Mapana Journal of Sciences
Research Articles

Analysis of Fluorescence Quenching of BPBD by Aniline in Toluene

  • J Thipperudrappa,
  • S M Hanagodimath
J Thipperudrappa
Department of Physics, BNM Institute of Technology, Bangalore-560 070, India
S M Hanagodimath
Department of Physics, Gulbarga University, Gulbarga-585 106, India
DOI: https://doi.org/10.12723/mjs.24.8

Published 2013-02-13

Keywords

  • Fluorescence quenching,
  • stern–volmer plot,
  • BPBD,
  • static quenching,
  • dynamic quenching,
  • finite sink approximation model
    • ...More
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Abstract

Fluorescence quenching of 2-(4'-t-Butylphenyl)-5-(4"-biphenylyl)-1,3,4-oxadiazole (BPBD) by aniline in toluene has been carried out at room temperature by steady state and time resolved fluorescence spectroscopy. The Stern-Volmer plot by steady state method has been found to be non-linear showing a positive deviation, whereas by time-resolved method it is linear. In order to interpret these results we have used the ground state complex and sphere of action static quenching models. Using these models various rate parameters have been determined. Based on these models, with finite sink approximation model, we conclude that positive deviation Stern-Volmer plot is due to the simultaneous presence of dynamic and static quenching processes.

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