ENHANCEMENT OF THE VIBRATIONAL-RELAXATION RATE OF SURFACE HYDROXYLS THROUGH HYDROGEN-BONDS WITH ADSORBATES

被引：35

作者：

BONN, M ^{[1
]}

BRUGMANS, MJP ^{[1
]}

KLEYN, AW ^{[1
]}

VANSANTEN, RA ^{[1
]}

机构：

[1] EINDHOVEN UNIV TECHNOL,SCHUIT INST CATALYSIS,5600 MB EINDHOVEN,NETHERLANDS

来源：

CHEMICAL PHYSICS LETTERS | 1995年 / 233卷 / 03期

关键词：

D O I：

10.1016/0009-2614(94)01411-N

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：

With time-resolved (picosecond) infrared saturation spectroscopy new information is obtained about the interaction of zeolite surface hydroxyls with small adsorbed molecules. It is found that the presence of the adsorbate, which is weakly hydrogen bonded to the zeolite hydroxyl, causes the vibrational lifetime of the zeolite hydroxyl to decrease. Remarkably, this enhancement of the de-excitation is neither due to energy transfer to internal degrees of freedom of the adsorbed species nor into a one-photon desorption process. Rather, it is due to an increased coupling of the hydroxyl stretching mode to its accepting modes.

引用

页码：309 / 314

页数：6

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