Accession Number : ADA132879

Title :   Molecular Supersonic Jet Studies of Aniline Solvation by Helium and Methane.

Descriptive Note : Technical rept.,


Personal Author(s) : Bernstein,E R ; Law,K ; Schauer,Mark

PDF Url : ADA132879

Report Date : 16 Sep 1983

Pagination or Media Count : 53

Abstract : Several aspects of the An-CH4 system have also been explored. These studies emphasize that 2-color MS experiments are essential to the study of vdW clusters and that they complement the FE and DE techniques. The 2-color MS experiment can be used to identify the origins and vdW vibrations associated with (An(CH4) and An(CH4)2 vibronic transitions. With this information it is possible to assign several cluster DE spectra. It is found that the vdW stretching frequency is nearly identical in the ground and excited states and that vibronic transitions evidence a strong delta V = 0 (in which V is some quantum of the vdW stretch) propensity rule. Also, it is demonstrated that attaching a CH4 molecule to An increases the density of states in the system to the point at which the rate of intramolecular vibrational redistribution (IVR) becomes comparable to the rate of fluorescence. Therefore, the kinetics of energy flow in the excited state may be addressed. The results and Discussion sections of this paper are each divided into two parts. First, new information concerning the An-He system will be presented and discussed in terms of their significance for I. Second, the results of FE, DE, and 2-color MS studies of the An-CH4 system will be shown and similarities and differences between the An-He and An-CH4 systems will be addressed.

Descriptors :   *Anilines, *Solvation, *Mass spectroscopy, Clustering, Molecular ions, Excitation, Methane, Helium, Supersonic characteristics, Vibrational spectra, Emission spectra, Ionization

Subject Categories : Organic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE