Dimers of Aromatic Molecules: (Benzene)(2), (Toluene)(2), and Benzene-Toluene.
Abstract
The optical absorption spectra of the first excited singlet states of the benzene, toluene, and toluene-benzene dimes, created in a supersonic molecular jet, are reported. The absorption spectra are detected through two-color time of flight mass spectroscopy; this method eliminates fragmentation of dimers and higher clusters and the dimer spectra are uniquely observed. The benzene dimer observed in this experiment is suggested to have a parallel stacked and displace configuration of C sub 2H symmetry. Both the toluene and toluene-benzene dimers have two configurations: parallel stacked and displaced (based on (benzene)2) and perpendicular. (Benzene)2, (toluene)2, and toluene-benzene form excimers in the excited state for the parallel stacked displaced configurations. The transformation of (benzene)2 to the excimer takes place at the 0 deg with approx. 0/cm barrier while the excimer is formed for toluene-benzene with a approx. 900/cm barrier. An exciton analysis of the (benzene) 0 deg and approx. 6 superscript 1 yields M sub 12, the excitation exchange interaction, equal to approx. 1.6 cm.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA164571
Entities
People
- Elliot R. Bernstein
- K. S. Law
- Mark Schauer
Organizations
- Colorado State University