ISSN:
1432-0649
Keywords:
33.20.Fb
;
82.30.Qt
;
82.40.Js
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract We present theS 1 Raman spectra of 1,4-DiPhenyl-1,3-Butadiene (DPB) in a series of linear alkanes (pentane, hexane, heptane, octane, decane, and dodecane). Bands assignable to both the 11 B u and 21 A g states are present, suggesting that the state we are observing in solution is a mixed state with both 11 B u and 21 A g character. The relative intensities of several bands associated with Co∔Co stretching motions in the 21 A g and 11 B u states change systematically through the solvent series. The relative intensity changes reflect a changing distribution ofs-trans conformers inS 1 DPB as the solvent is varied. We suggest that the distribution ofs-trans conformers inS 1 DPB controls the nature of the mixing between the 21 A g and 11 B u states and that the distribution of conformers is controlled by the solvent viscosity. Changes in the peak position and bandwidth of the phenyl C=C stretch with delay reflect vibrational relaxation processes inS 1 DPB. We observe anomolous behavior in pentane that we attribute to the effect of the solvent structure on the ability of DPB to exchange energy with pentane.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01081061
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