Matrix spectroscopy in the gas phase: IR spectroscopy of argon clusters containing SF6 or CH3F

✍ Scribed by T.E. Gough; D.G. Knight; G. Scoles

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 538 KB
• Volume: 97
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(83)85007-6

✦ Synopsis

Optothermal (bolometric) detection and a line-tunable CO* laser hare been used. in conjuncrion with supersonic beaus of dilute mixtures of SF6 or CH3F in Ar. to obtain the infrared spectra of Ar clusters containing these molecules_ The spectra obtained at the limit of large clusters are remarkably similar to the infrared Ar matrix deposition bpectra of the same molcrules. 1. Introduction Recently. molecular beam techniques in general and free jet expansions in particular have become very useful tools in the study of atoms and molecules in small clusters [ I]. Use of this technology has made the monitoring of the properties of an atom or molecule. as they change from those of isolated species to those of a bulky phase. possible. This occurs through a range that is sufficiently unique to have received the name "fifth state of matter" [l] _ Recently work by Stein and co-workers [2,3] using electron diffraction has shown that it is possible to form crystalline SF6 in a molecular beam formed by an espansion of a dilute mixture of SF6 in argon. Also. Kim and Stein [4] show that Ar can be condensed onto SF, clusters that have already formed by using small diameter nozzles. This suggests that Ar clusters containing a single SF, molecule can be produced if nozzles with sufficiently small orifices and mixtures of sufficiently high dilution are used. This possibility is intriguing because a spectral study of the seeded molecule could then be carried * An interdisciplinary Centre whose members participate in the Cuelph-Waterloo Program for Graduate Work in Physics, The Guelph-Waterloo Centre for Graduate Work in Chemistry and the Guelph-Waterloo Surface Science and Technology Group. 'dume 97. number ', CHEWCAL PHYSICS LETTERS