TY - JOUR
T1 - Vibrational relaxation of an amino acid in aqueous solution
AU - Shigeto, Shinsuke
AU - Dlott, Dana D.
N1 - Funding Information:
This material is based upon work supported by the National Science Foundation under award DMR 0504038, and the Air Force Office of Scientific Research under award FA9550-06-1-0235.
PY - 2007/10/15
Y1 - 2007/10/15
N2 - Time-resolved Raman spectroscopy is used to study vibrational energy redistribution after CH-stretch excitation, of glycine zwitterion in aqueous solution. Anti-Stokes Raman monitors the glycine vibrations and Stokes Raman monitors heating of the surrounding water, which acts as a molecular thermometer. A three-step mechanism is proposed for vibrational cooling (VC) that includes 0.8 ps decay of the parent CH-stretch, 1.0 ps relaxation of the midrange vibrations and 1.2 ps relaxation of the lower-energy vibrations. The overall VC process observed by the molecular thermometer is represented by a 1.8 ps time constant.
AB - Time-resolved Raman spectroscopy is used to study vibrational energy redistribution after CH-stretch excitation, of glycine zwitterion in aqueous solution. Anti-Stokes Raman monitors the glycine vibrations and Stokes Raman monitors heating of the surrounding water, which acts as a molecular thermometer. A three-step mechanism is proposed for vibrational cooling (VC) that includes 0.8 ps decay of the parent CH-stretch, 1.0 ps relaxation of the midrange vibrations and 1.2 ps relaxation of the lower-energy vibrations. The overall VC process observed by the molecular thermometer is represented by a 1.8 ps time constant.
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U2 - 10.1016/j.cplett.2007.08.091
DO - 10.1016/j.cplett.2007.08.091
M3 - Article
AN - SCOPUS:34848913466
VL - 447
SP - 134
EP - 139
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
IS - 1-3
ER -