Spectroscopic Studies of Toluene in Simple Molecular Liquids.

Abstract

Absorption and emission spectra and fluorescence lifetimes are reported for the 1B1 state of toluene in a number of simple hydrocarbon solvents CH4, C2H6, C3H8, C2H4, C3H6, and 1-C4H8). Spectroscopic data such as gas to liquid shifts, intermolecular Franck-Condon shifts, line widths, and their temperature dependences can be employed to study potentials in the cryogenic liquid near the equilibrium separation for solvent and solute. Life-times as a function of concentration and temperature indicate that toluene excimers do not form, apparently due to steric hindrance. The results for toluene are compared and contrasted to those for benzene. The intermolecular interactions are nearly identical for the two systems suggesting polarizabilities and not dipole moments are important for CnHm solvents and hydrocarbon probe systems. Toluene relaxation kinetics and their temperature dependences are discussed. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 28, 1982
Accession Number
ADA119821

Entities

People

  • Elliot R. Bernstein
  • Fangxing Li
  • Jung‐Hee Lee

Organizations

  • Colorado State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Alkanes
  • Alkenes
  • Aromatic Hydrocarbons
  • Chemical Synthesis
  • Chemistry
  • Cyclic Hydrocarbons
  • Dipole Moments
  • Emission Spectra
  • Energy Levels
  • Energy Transfer
  • Heat Of Activation
  • Hydrocarbons
  • Kinetics
  • Measurement
  • Physical Chemistry
  • Quenching
  • Spectra

Fields of Study

  • Chemistry

Readers

  • Groundwater Contamination Remediation.
  • Molecular Photonics/Laser Physics
  • Systems Analysis and Design