Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 22, Pages 5035-5038Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.5035
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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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