Solvent solute interactions probed by picosecond transient Raman spectroscopy:S 1 1,4-diphenyl-1,3-butadiene in the linear alkanes

Picosecond CARS and Transient Absorption Studies of 1,4-Diphenylbutadiene and trans-Stilbene: A Study of Photoinduced Formation of a Radical Cation

“…Under UV excitation, new Raman bands appeared that could be unambiguously attributed, on the basis of previous work, , to the excited DPB vibration modes. The mode observed in heptane solution at 1580 cm -1 and two vibrational modes at 1170 cm -1 (C−C−H bending) and near 1230 cm -1 (corresponding to the commonly called “broad structure”) were clearly visible in ethanol because the overlaps with the solvent bands were smaller in ethanol than in heptane. However, kinetic studies revealed unexpected behavior not observed in heptane.…”

Solvent−Solute Interactions Probed by Picosecond Transient Raman Spectroscopy: Vibrational Relaxation and Conformational Dynamics in S1trans-4,4‘-Diphenylstilbene

“…Morris and Gustafson have interpreted the anomalous behavior of the band attributed to phenyl stretching motions in 1,4-diphenyl-1,3-butadiene in pentane, where there is an absence of dynamics in peak position relative to other linear alkanes, to a difference in the solvent structure. 5 Rice and Baronazski have observed an anomalously long lifetime for cis-stilbene (cS) in cyclohexane that they attribute to the specific way in which the solvent molecules interact with the cS molecule. 64 In addition, Jiang and Blanchard have presented results for perylene in various alkane solvents that indicate the presence of short range order in the solvent cage surrounding the solute molecule.…”

“…Morris and Gustafson have reported S 1 transient Raman results for 1,4diphenyl-1,3-butadiene (DPB) in several solvents. 4,5 They observe peak position and bandwidth changes for the olefin stretch of the 1 1 B u mode of DPB. 4 They attribute the changes to vibrational relaxation of the DPB molecule.…”

Solvation Dynamics Probed by Femtosecond Transient Absorption Spectroscopy: Vibrational Cooling and Conformational Relaxation in S1 trans-4,4‘-Diphenylstibene

“…Transient resonance Raman spectroscopy has been shown to provide mode-specific details of solvent-induced structural changes for a variety of probe molecule. [1][2][3][4][6][7][8][10][11][12][13]26 Transient absorption and transient Raman spectra can provide complementary information on vibrational and conformational dynamics of a probe molecule in differing solvent environments. 4,6,7,12,[28][29][30] In general, multiple time-resolved spectroscopic methods are necessary to gain a more complete understanding of the various relaxation processes, including vibrational cooling, conformational relaxation and solvent reorganization because they all occur on similar time scales.…”

“…Superimposed upon the fundamental photophysics of molecules in solution are the effects of the microscopic solvent environment. Time-resolved absorption, fluorescence and vibrational spectroscopy have been used extensively to probe the effect of solvent on excited-state relaxation processes. − Transient resonance Raman spectroscopy has been shown to provide mode-specific details of solvent-induced structural changes for a variety of probe molecule. − ,− ,− , Transient absorption and transient Raman spectra can provide complementary information on vibrational and conformational dynamics of a probe molecule in differing solvent environments. ,,,,− In general, multiple time-resolved spectroscopic methods are necessary to gain a more complete understanding of the various relaxation processes, including vibrational cooling, conformational relaxation and solvent reorganization because they all occur on similar time scales.…”