Journal of Photoscience

Korean Society of Photoscience (한국광과학회)
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EFFECT OF SOLVENT POLARITY ON THE FLUORESCENCE QUENCHING OF ORGANIC LIQUID SCINTILLATORS BY ANILINE

  • Shailaja, M.K. (Department of Physics,Gulbarga University) ;
  • Hanagodimath, S.M. (Department of Physics, Gulbarga University) ;
  • Kadadevarmath, J.S. (Department of Physics, Karnatak University) ;
  • Chikkur, G.C. (Department of Physics, Karnatak University)
  • Published : 1999.12.01
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Abstract

The fluorescence quenching of 2-phenyl-5-(4-biphenylyl)-1,3,4-oxadiazole (PBD) and 1,4-di-[2-(5-phenyloxazolyl)]-benzene (POPOP) by aniline has been carried out in different solvent mixtures of dioxane and acetonitrile at room temperature. The quenching is found to be appreciable and a positive deviation from linearity was observed in the Stern-Volmer plot in all the solvent mixtures. Various rate constants for the quenching processes have been determined using a modified Stern-Volmer equation. From the positive deviations of linear Stern-Volmer plots and the dependence of rate constants on the polarity of the solvents, it has been concluded that both static and dynamic quenching processes are responsible for the observed positive deviation in the Stern-Volmer plot.

Keywords

References

  1. Chem. Phys. Lett. v.140 Fluorescence quenching of carbozole and indole by ethylenetrithiocarbonate Roy, R.;Mukherjee
  2. Bull. Chem. Soc. Jpn. v.57 Excited-state reactions of coumarins in aqueous solutions Ⅱ, The fluorescence quenching of 7-ethoxycoumarins by halide ions Moriya,T.
  3. J. Chem. Phys. v.84 Electronic excitation energy transfer in organic liquid scintillators Mathad, R. D.;G. C. Chikkur;N. Umakantha
  4. Phys. Lett. v.A123 Effect of dilution and temperature on the Energy transfer and quenching in an organic liquid scintillator Umarjee, D. M.;G. C. Chikkur
  5. Appl. Radiat. Isot. v.41 Role of Brownian diffusion and interaction distance on energy transfer and quenching in an organic liquid scintillator Hanagodimath, S. M.;G. S. Gadaginmath;G. C. Chikkur
  6. J. Photochem. Photobiol. v.33 Solvent and concentration effects on the steady state fluorescence of fluorenone Arathi, Rani, S.;J. Sobhanadri;T. A. Prasad Rao
  7. J. Photochem. Photobiol. A Chem. v.71 Static and dynamic model for 1-naphthol fluorescence quenching by carbon tetrachloride in dioxan-acetonitrile mixtures Behera, P. K.;A. K. Mishra
  8. Chem. Phys. v.28 Kinetics of partly diffusion controlled reactions, Transient apparent transient and I effect in fluorescence quenching Andre, J. C.;M. Niclause;W. R. Ware
  9. Molecular Volumes and Parachor Edward, J. T.
  10. J. Phys. v.B3 Energy transfer in organic systems VIII, Quenching of naphthalene fluorescence by biacetyl Birks, J. B.;S. C. P. Salate;M. Leite
  11. J. Chem. Phys. v.62 Kinetics of diffusion controlled reactions: transient effects in fluorescence quenching Nemzek, T. L.;W. R. Ware
  12. J. Chem. Soc. Farad. Trans. v.1172 Quenching of toluene fluorescence by oxygen Lewis, C.;W. R. Ware