Spectroscopic evidence for a nonrigid—rigid transition in isotopically labelled (benzene)13

✍ Scribed by David C. Easter; A.P. Baronavski; Michael Hawley

• Book ID: 103032358
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 807 KB
• Volume: 206
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)85560-b

✦ Synopsis

In a recent report by Easter, Khoury and Whetten, analysis of the ultraviolet (Bzu t&,( 64) ) REMPI spectroscopy of cold (C,H,) (CeD6)+, clusters, n= 12-20, yielded strking conclusions: observed CsHs resonances derive almost exclusively from molecules in the cluster's interior site; and the I3-cluster is found to have only one dominant isomeric form, giving rise to a single prominent spectral feature. Here we report the evolution of the benzene& transition in (C,H,) ( C6D,) 12 as a function of distance (time) from the nozzle in the supersonic jet expansion, and present the first experimental evidence for a nonrigid-rigid transition in a single-size molecular cluster. Initially (benzene),, condenses in a nonrigid state and solidification into a well-defined con&uration occurs during subsequent free jet expansion.