EPR study on NO introduced into lithium ion-exchanged LTA zeolites

被引:11
作者
Yahiro, H [1 ]
Kurohagi, K
Okada, G
Itagaki, Y
Shiotani, M
Lund, A
机构
[1] Ehime Univ, Fac Engn, Dept Appl Chem, Matsuyama, Ehime 7908577, Japan
[2] Hiroshima Univ, Fac Engn, Dept Appl Chem, Higashihiroshima 7398527, Japan
[3] Linkoping Univ, IFM, Chem Phys Lab, S-58183 Linkoping, Sweden
关键词
D O I
10.1039/b203930c
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
Nitrogen monoxide (NO) introduced into partially and fully lithium ion (Li+)-exchanged A-type zeolite was studied by X-band EPR measurements. Two types of NO species, NO monoradical and NO-NO biradical, were detected for the partially ion-exchanged zeolite, while the latter was less detectable for the fully ion-exchanged one. The EPR parameters of the NO monoradical provided evidence that the electrostatic field associated with Li+ ions in A-type zeolites is weaker than that with Na+ ions. It was found that the molecular distance of NO biradical formed in partially Li+-exchanged zeolite was shorter than that in sodium ion-exchanged A-type zeolite.
引用
收藏
页码:4255 / 4259
页数:5
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