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"Cooling of hot para-nitroaniline probed by non-resonant Raman scattering" Q. An, P. GilchChemical Physics Letters 363 (2002) 397-403 Abstract: Non-resonant anti-Stokes Raman probing of vibrational excitations following ultrafast (400 fs in methanol) internal conversion of para-nitroaniline is demonstrated. Immediately after this process an anti-Stokes signal blue shifted by 1290 cm-1 with respect to the probe laser pulse at 815 nm appears. The signal which is due to the NO2 stretch vibration moves to an anti-Stokes shift of 1315 cm-1 corresponding to the Stokes position of this vibration in 1 ps. The decay of this signal is slower and occurs within 3 ps. Possible origins of the strong initial red-shift of the anti-Stokes line are discussed. BMO authors (in alphabetic order): Peter Gilch Qingrui Nielson Assoziierte Projekte: The flow of vibrational energy in molecules Order Hardcopy |