LOW-TEMPERATURE FOURIER-TRANSFORM INFRARED STUDY OF THE INTERACTION OF CO WITH CATIONS IN ALKALI-METAL EXCHANGED ZSM-5 ZEOLITES

被引：135

作者：

ZECCHINA, A ^{[1
]}

BORDIGA, S ^{[1
]}

LAMBERTI, C ^{[1
]}

SPOTO, G ^{[1
]}

CARNELLI, L ^{[1
]}

AREAN, CO ^{[1
]}

机构：

[1] UNIV ILLES BALEARS, DEPT QUIM, E-07071 PALMA DE MALLORCA, SPAIN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1994年 / 98卷 / 38期

关键词：

D O I：

10.1021/j100089a035

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：

Fourier transform IR spectra of carbon monoxide adsorbed at liquid nitrogen temperature on a series of alkalimetal exchanged ZSM-5 zeolites [X-ZSM-5 (X = Li, Na, K, Rb, Ca)] show that the dipolar:CO molecule specifically interacts with the zeolite extraframework metal ions. This interaction modifies the C-O stretching frequency, which increases continuously from 2157 cm(-1) for Cs-ZSM-5 upto 2188 cm(-1) for Li-ZSM-5. It is shown that the observed frequency shift (from nu(CO) = 2143 cm(-1)) can be used to evaluate the electrostatic field created by the metal cations. Nonspecifically adsorbed (physisorbed) CO was also observed as well as some minor IR absorption bands which were tentatively assigned.

引用

页码：9577 / 9582

页数：6

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