VIBRATIONAL SPECTROSCOPY OF POROUS VYCOR GLASS - SURFACE HYDROXYL PERTURBATIONS UPON ADSORPTION OF HYDROGEN

被引：18

作者：

HUBER, TE

HUBER, CA

机构：

[1] Department of Physics, University of Puerto Rico, Rio Piedras

[2] Harvard University, Department of Physics, Cambridge

[3] Francis Bitter National Magnet Laboratory, Massachusetts Institute of Technology, Cambridge

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1990年 / 94卷 / 06期

关键词：

D O I：

10.1021/j100369a053

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Infrared absorption measurements have been performed on the hydroxyl vibrational overtone and combinations in porous Vycor glass. The frequency shifts upon adsorption of H2 have been studied as a function of coverage. For a surface layer coverage of H2 a shift of the OH stretching fundamental of 15 cm-1 is obtained, much larger than that previously observed in silicas upon adsorption of argon. The shift can be accounted for if van der Waals interactions between adsorbed H2 and the surface OH and if the surface layer density of the adsorbate are considered. The contribution of polarization interactions to the OH frequency shift is found to be small. The role of quadrupole and hydrogen-bonding interactions is also examined. © 1990 American Chemical Society.

引用

页码：2505 / 2511

页数：7

共 38 条

[1] NEAR INFRARED CHARACTERIZATION OF WATER AND HYDROXYL GROUPS ON SILICA SURFACES [J].