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CP: Chemische Physik

CP 5: Nichtlineare Eigenschaften

CP 5.10: Poster

Monday, March 9, 1998, 18:00–20:00, P1

MULTI-PHOTON FLUORESCENCE SPECTROSCOPY OF SATURATED HYDROCARBONS — •Andreas Volkmer and David J.S. Birch — Department of Physics and Applied Physics, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG, UK

We have observed multi-photon induced fluorescence spectra and lifetimes from commonly used saturated hydrocarbons such as cyclohexane and methylcyclohexane using near infrared femtosecond laser excitation and single-photon timing detection. Previous work [1] has successfully used frequency-doubled two-photon dye laser excitation at 298 nm and phase/modulation detection to record fluorescence from such solvents as an easier alternative to vacuum ultra-violet techniques [2,3]. Our results demonstrate a new approach in studying the photophysics of saturated hydrocarbons.

[1] J.R. Lakowicz and I. Gryczynski, Biospectroscopy, 1,3-8 (1995) 3-8 [2] W. Rothman, F. Hirayama and S. Lipsky, J. Chem. Phys., 58,4 (1973) 1300-1317 [3] W.R. Ware and R.L. Lyke, Chem. Phys. Lett., 24,2 (1974) 195-198