Preparation of ordered SBA-15 mesoporous silica containing chelating groups.: Study of the complexation of EuIII inside the pore channels of the materials

被引:41
作者
Corriu, RJP
Mehdi, A
Reyé, C
Thieuleux, C
Frenkel, A
Gibaud, A
机构
[1] Univ Montpellier 2, CNRS, UMR 5637, Lab Chim Mol & Org Solide, F-34095 Montpellier 5, France
[2] Yeshiva Univ, Dept Phys, New York, NY 10016 USA
[3] Univ Maine, CNRS, UMR 6087, Lab Phys Etat Condense, F-72085 Le Mans 09, France
关键词
D O I
10.1039/b307526e
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Ordered mesoporous silica containing 3-chloropropyl groups was prepared by a direct synthetic approach involving hydrolysis and co-condensation of tetraethylorthosilicate (TEOS) and 3-chloropropyltrimethoxysilane in the presence of the triblock copolymer P123 as the structure-directing agent and under acidic conditions. Nucleophilic displacement of chloro groups by cyclam moieties (cyclam=1,4,8,11-tetraazacyclotetradecane) was then achieved almost quantitatively. Subsequent treatment of solids containing different amounts of cyclam moieties with an ethanolic solution of europium (III) chloride gave rise to 1:1 Eu-III/cyclam complexes. The EXAFS studies have shown that Eu-III adopts an octahedral geometry.
引用
收藏
页码:156 / 160
页数:5
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