VIBRATIONAL DYNAMICS OF ADSORBED D2O ON BRONSTED HYDROXYL GROUP IN A ZEOLITE

Citation
K. Domen et al., VIBRATIONAL DYNAMICS OF ADSORBED D2O ON BRONSTED HYDROXYL GROUP IN A ZEOLITE, MICROPOROUS AND MESOPOROUS MATERIALS, 21(4-6), 1998, pp. 673-678
Citations number
42
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Chemistry Physical","Material Science","Chemistry Applied
ISSN journal
1387-1811
Volume
21
Issue
4-6
Year of publication
1998
Pages
673 - 678
Database
ISI
SICI code
1387-1811(1998)21:4-6<673:VDOADO>2.0.ZU;2-U
Abstract
The spectroscopic and dynamic features of vibrationally excited water molecules (D2O) adsorbed on deuterated mordenite zeolite(DM-20) have b een observed by infrared-infrared pump-probe experiments. The vibratio nal lifetimes of D2O molecules adsorbed on zeolite hydroxyl groups hav e been determined to be 43 +/- 5 ps for the OD group which is rather f ree from interaction, and approximate to 15 ps for the OD group under strong hydrogen bonding to the surface. By infrared pumping, a newly a ppearing absorption band (approximate to 15 ps) was observed at around 2730 cm(-1). In basic accordance with the report by Graener and Seife rt on a solution of H2O and D2O in solvents, a possible assignment of the absorption band is discussed. (C) 1998 Elsevier Science B.V. All r ights reserved.