RAJCHENBACH, C.; JONUSAUSKAS, Gediminas; RULLIERE, C.

doi:10.1016/0009-2614(94)01275-X

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RAJCHENBACH, C.
Centre de physique moléculaire optique et hertzienne [CPMOH]

JONUSAUSKAS, Gediminas
Centre de physique moléculaire optique et hertzienne [CPMOH]

RULLIERE, C.
Centre de physique moléculaire optique et hertzienne [CPMOH]

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Chemical Physics Letters. 1994-12-30, vol. 231, n° 4-6, p. 467-475

Elsevier

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Using a sub-picosecond CARS experiment we observed the direct photolysis of liquid nitromethane after pulse excitation at 299 nm. We measured the dynamical behaviour under excitation of three main ground-state Raman lines: the v(CN) mode at 917 cm−1, the vs (NO2) and δs (CH3) modes near 1400 cm−1 and the Vs(CH3) mode at 2968 cm−1. From the evolution of these modes we deduced that the excited state disappears with a lifetime of 1.1 ± 0.3 ps and we measured a photolysis quantum yield at 299 nm of 24% ± 5%. A non-radiative de-excitation channel from the excited to the ground state has been observed and its possible role in the explosive process is discussed.< Leer menos

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Direct observation of the photodecomposition of liquid nitromethane under UV photolysis by sub-picosecond time-resolved CARS experiments

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