Accession Number:

ADA207140

Title:

Raman Study of Solid State Reactions

Descriptive Note:

Final rept. 1 Sep 1979-31 Aug 1980

Corporate Author:

STATE UNIV OF NEW YORK AT BUFFALO DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1980-08-31

Pagination or Media Count:

11.0

Abstract:

The mechanisms and the reaction dynamics of several solid state reactions were investigated. The thermal rearrangement reaction of methyl-p-dimethylaminobenzene sulfonate MSE in pure crystal to form the product p-trimethylammonium benzene sulfonate Zwitterion ZWT was investigated during this period. Detailed studies of the phonon spectra as well as the internal vibration spectra were made as a function of the percentage rearrangement using polycrystalline samples as well as single crystals in different orientations. Solid state photodimerization of two modifications of trans-cinnamic acids in pure crystal was investigated. Also, the topotactic transformation reaction of iodobenzoyl peroxide was investigated. This reaction is thermally enhanced and yields a number of products. An important aspect of a dynamical model is to determine specificity in phonon induction of solid state reactions. In order that a large population of selective and coherent vibrational excitation can be achieved to study its effect on reactivity it is necessary that vibrational relaxation be slow. The dephasing of a localized internal vibration of the naphtalene crystal was investigated by studying the temperature dependence of the line width, the line shape and the line frequency.

Subject Categories:

  • Physical Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE