Discrimination of MgO ions by means of an improved in situ photoluminescence cell and of propyne as probe molecule

被引：19

作者：

Bailly, ML

Costentin, GN

Krafft, JM

Che, M

机构：

[1] Univ Paris 06, Inst Univ France, CNRS, UMR 7609, F-75252 Paris 05, France

[2] Univ Paris 06, Lab React Surface, CNRS, UMR 7609, F-75252 Paris 05, France

来源：

CATALYSIS LETTERS | 2004年 / 92卷 / 3-4期

关键词：

photoluminescence; oxide ions; basicity; coordination; alkaline earth; quenching; dynamic vacuum; in situ probe molecule; propyne;

D O I：

10.1023/B:CATL.0000014331.73108.67

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：

Technical improvement of the photoluminescence cell and its coupling to a dynamic vacuum system allow to avoid quenching phenomena. These results in emission spectra of MgO, which are better-resolved and more stable in time, leading to a better characterization of the very reactive oxide ions, i.e., those in low coordination. Apart from a more precise assignment of the spectra, new developments are proposed to evaluate the relative distribution of ions of low coordination. Discrimination of the oxide ions with different coordination numbers is also possible by studying in situ their interaction with propyne as a probe molecule.

引用

页码：101 / 105

页数：5

共 27 条

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