Energy transfer between adsorbed molecules on a dielectric surface following ultraviolet excitation

✍ Scribed by C.J.S.M. Simpson; K.R. Yoxall; A.S. Solodukhin; A. Takami; J.M. Curry; A.W. Parker

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 407 KB
• Volume: 210
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)89090-5

✦ Synopsis

Vibrational energy transfer between adsorbed molecules has been observed using time of flight mass spectroscopy. l,kycloheptadiene was adsorbed on a MgF2 surface at 30 K both alone and with cyclohexane, CS2 and Xe as co-adsorbates. A KrF laser was used to electronically excite 1,3-cycloheptadiene. Following excitation, laser-induced desorption was observed for both 1,3cycloheptadiene as well as far the co-adsorbates. The time of flight spectra were fitted using Maxwell-Boltzmann distributions and characteristic temperatures were obtained. These, together with the relative yields, have shown that energy transfer occurs from 1,3-cycloheptadiene to cyclohexane and to a lesser extent from I ,3-cycloheptadiene to C!$.