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Pirani F, Cappelletti D, Bartolomei M, et al. Orientation of benzene in supersonic expansions, probed by IR-laser absorption and by molecular beam scattering. Phys Rev Lett. 2001;86(22):5035-8doi: 10.1103/PhysRevLett.86.5035.
Pirani, F., Cappelletti, D., Bartolomei, M., Aquilanti, V., Scotoni, M., Vescovi, M., Ascenzi, D., & Bassi, D. (2001). Orientation of benzene in supersonic expansions, probed by IR-laser absorption and by molecular beam scattering. Physical review letters, 86(22), 5035-8. https://doi.org/10.1103/PhysRevLett.86.5035
Pirani, F, et al. "Orientation of benzene in supersonic expansions, probed by IR-laser absorption and by molecular beam scattering." Physical review letters vol. 86,22 (2001): 5035-8. doi: https://doi.org/10.1103/PhysRevLett.86.5035
Pirani F, Cappelletti D, Bartolomei M, Aquilanti V, Scotoni M, Vescovi M, Ascenzi D, Bassi D. Orientation of benzene in supersonic expansions, probed by IR-laser absorption and by molecular beam scattering. Phys Rev Lett. 2001 May 28;86(22):5035-8. doi: 10.1103/PhysRevLett.86.5035. PMID: 11384414.
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Phys Rev Lett. 2001 May 28;86(22):5035-8. doi: 10.1103/PhysRevLett.86.5035.

Orientation of benzene in supersonic expansions, probed by IR-laser absorption and by molecular beam scattering.

Physical review letters

F Pirani, D Cappelletti, M Bartolomei, V Aquilanti, M Scotoni, M Vescovi, D Ascenzi, D Bassi

Affiliations

  1. Dipartimento di Chimica and Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, 060123-Perugia, Italy.

PMID: 11384414 DOI: 10.1103/PhysRevLett.86.5035

Abstract

This work represents the first experimental demonstration that planar molecules tend to travel as a "frisbee" when a gaseous mixture with lighter carriers expands into a vacuum, the orientation being due to collisions. The molecule is benzene, the prototype of aromatic chemistry. The demonstration is via two complementary experiments: interrogating benzene by IR-laser light and controlling its orientation by selective scattering on rare gas targets. The results cast new light on the microscopic mechanisms of collisional alignment and suggest a useful way to produce intense beams of aligned molecules, permitting studies of steric effects in gas-phase processes and in surface catalysis.

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