Benzene clustered with N2, CO2, and CO: Energy levels, vibrational structure, and nucleation

Article abstract of DOI:10.1063/1.455182

Two-color time-of-flight mass spectroscopy is employed to study the van der Waals (vdW) clusters of benzene(N2)ⁿ (n<*>8),benzene(C02)n (n<*>7),and benzene(CO)_n (n=1,2) created in a supersonic molecular jet.Potential energy calculations of cluster geometries, normal coordinate analysis of vdW vibrational modes, and calculations of the internal rotational transitions are employed for the assignment of the benzene(solvent)₁ cluster spectra in the 0⁰₀ and 6¹₀ regions of the benzene ¹B_2u^<-1A1g transition.The respective vibronic and rotational selection rules for these clusters are determined based on the appropriate point groups and molecular symmetry groups of the clusters.Good agreement between the calculated and experimental spectra is obtained with regard to the vdW vibrational and internal rotational modes.The solvent molecules rotate nearly freely with respect to benzene about the benzene-solvent bond axis in the benzene(solvent), clusters.In the excited state a small ca. 20 cm^-1 barrier to rotation is encountered.Studies of larger clusters (n > 2) reveal a broad red shifted single origin in the 6¹₀ spectra.A linearly increasing cluster energy shift is observed as a function of cluster size.The cluster energy shifts are not saturated by one solvent molecule on each side of the aromatic ring; several solvent molecules effectively interact with the solute ? electronic cloud.Both homogeneous and inhomogeneous nucleation take place for the clusters studied depending on the ratio of the solvent-solvent binding energy to the cluster binding energy.

Full text of DOI:10.1063/1.455182

Benzene clustered with N2, CO2, and CO: Energy levels, vibrational structure, and
nucleation
R. Nowak, J. A. Menapace, and E. R. Bernstein
Citation: The Journal of Chemical Physics 89, 1309 (1988); doi: 10.1063/1.455182
View online: http://dx.doi.org/10.1063/1.455182
View Table of Contents: http://scitation.aip.org/content/aip/journal/jcp/89/3?ver=pdfcov
Published by the AIP Publishing
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This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29

This article is copyrighted as indicated in the article. Reuse of AIP content is subject to the terms at: http://scitation.aip.org/termsconditions. Downloaded to IP:
128.114.34.22 On: Wed, 26 Nov 2014 16:24:29