Baskin, J. S. and Felker, P. M. and Zewail, A. H. (1986) Doppler-free time-resolved polarization spectroscopy of large molecules: Measurement of excited state rotational constants. Journal of Chemical Physics, 84 (8). pp. 4708-4710. ISSN 0021-9606 http://resolver.caltech.edu/CaltechAUTHORS:BASjcp86a
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Measurement of the rotational spectra and constants of molecules can be a powerful probe of excited state geometries and intramolecular dynamics. The conventional approach for obtaining rationally resolved spectra is to use high-resolution (frequency domain, time-integrated) laser excitation. For medium-sized molecules, recent advances in these high-resolution techniques have made it possible to obtain Doppler-free spectra of benzene(1) (using two-photon excitation), and jet-cooled spectra of tetrazines,(2) pyrazine,(3) and others.(4) These results on medium-sized molecules have provided valuable information on geometries, (1,2) and on the dynamics of intramolecular singlet-triplet coupling(3,5) and the “channel 3” decay in benzene.(1) For large molecules, to obtain rationally resolved spectra one needs stable, ultra-narrow bandwidth lasers together with a scheme to reduce Doppler broadening to less than several megahertz.
|Additional Information:||Copyright © 1986 American Institute of Physics. Received 7 January 1986; accepted 6 February 1986. Arthur Amos Noyes Laboratory of Chemical Physics Contribution No. 7351. This work was supported by a grant from the National Science Foundation (DMR-8521191).|
|Subject Keywords:||ROTATIONAL STATES; EXCITED STATES; ENERGY–LEVEL TRANSITIONS; POLARIZATION; SPECTRAL RESOLUTION; STILBENE; FLUORESCENCE; MOLECULAR STRUCTURE|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||06 Mar 2006|
|Last Modified:||26 Dec 2012 08:47|
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