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Title: Analysis of depolarization ratios of ClNO{sub 2} dissolved in methanol

A detailed analysis of the resonance Raman depolarization ratio dispersion curve for the N–O symmetric stretch of nitryl chloride in methanol at excitation wavelengths spanning the D absorption band is presented. The depolarization ratios are modeled using the time-dependent formalism for Raman scattering with contributions from two excited states (2{sup 1}A{sub 1} and 3{sup 1}B{sub 1}), which are taken as linearly dissociative along the Cl–N coordinate. The analysis focuses on the interplay between different types of broadening revealing the importance of inhomogenous broadening in determining the relative contributions of the two electronic transitions. We find that the transition dipole moment (M) for 2{sup 1}A{sub 1} is greater than for 3{sup 1}B{sub 1}, in agreement with gas phase calculations in the literature [A. Lesar, M. Hdoscek, M. Muhlhauser, and S. D. Peyerimhoff, Chem. Phys. Lett. 383, 84 (2004)]. However, we find that the polarity of the solvent influences the excited state energetics, leading to a reversal in the ordering of these two states with 3{sup 1}B{sub 1} shifting to lower energies. Molecular dynamics simulations along with linear response and ab initio calculations support the evidence extracted from resonance Raman intensity analysis, providing insights on ClNO{sub 2} electronic structure, solvation effects inmore » methanol, and the source of broadening, emphasizing the importance of a contribution from inhomogeneous linewidth.« less
Authors:
;  [1] ;  [2] ;  [3] ;  [2]
  1. Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678, Nicosia (Cyprus)
  2. Department of Chemistry, University of Rochester, Rochester, New York 14627 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22253169
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 140; Journal Issue: 1; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION; CHLORIDES; DEPOLARIZATION; DIPOLE MOMENTS; DISPERSIONS; ELECTRONIC STRUCTURE; EXCITATION; EXCITED STATES; METHANOL; MOLECULAR DYNAMICS METHOD; RAMAN EFFECT; SIMULATION; SOLVATION; SOLVENTS; TIME DEPENDENCE; WAVELENGTHS