ABSORPTION-SPECTRA OF SELENIUM CLUSTERS AND CHAINS INCORPORATED INTO ZEOLITES

被引：55

作者：

NOZUE, Y ^{[1
]}

KODAIRA, T ^{[1
]}

TERASAKI, O ^{[1
]}

YAMAZAKI, K ^{[1
]}

GOTO, T ^{[1
]}

WATANABE, D ^{[1
]}

THOMAS, JM ^{[1
]}

机构：

[1] UCL ROYAL INST GREAT BRITAIN, DAVY FARADAY RES LAB, LONDON W1X 4BS, ENGLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 23期

关键词：

D O I：

10.1088/0953-8984/2/23/011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Absorption spectra are reported for Se adsorbed in faujasite (X or Y) as a function of x, where x is the Al-to-(Al+Si) ratio. The amount of adsorbed Se increases with increasing x for small x and is saturated for x>or approximately=0.1. The results are interpreted using the model in which the finite number of Se atoms are physically adsorbed by each permanent dipole which consists of (AlO4)- in a zeolite framework and cation. The energy of the lower absorption edge changes with x and the spectral shapes are classified into three types. Spectral differences are also observed for Se incorporated into Linde type A and Linde type L lattices. From a comparison with the spectrum of the isolated Se chain in mordenite, the structures of Se in A and L are expected to be isolated clusters and double parallel chains, respectively.

引用

页码：5209 / 5217

页数：9

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