Vibrational dynamics of adsorbed D2O on Brønsted hydroxyl group in a zeolite

✍ Scribed by K. Domen; T. Fujino; A. Wada; C. Hirose; S.S. Kano

• Book ID: 104431416
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 530 KB
• Volume: 21
• Category: Article
• ISSN: 1387-1811
• DOI: 10.1016/s1387-1811(98)00038-9

✦ Synopsis

The spectroscopic and dynamic features of vibrationally excited water molecules (D,O) adsorbed on deuterated mordenite zeohte { DM-20) have been observed by infrared-infrared pump-probe eqef~ments. The vibrationa'l Uetimes of D,O molecules adsorbed on zeolite hydroxyl groups have been determined to be 43 i 5 ps for the OD group which is rather free from interaction, and R 1.5 ps for the OD group under strong hydrogen bonding to the surface. By infrared pumping, a newly appearing absorption band (z 15 ps) was observed at around 2730 cm-.'. In basic accordance with the report bq' Graener and Seifert on a solutian of I-I@ and I>,0 in solvents, a possible assignmen:nt of the absorption band is discussed.