An ESR study of titanium-silicalite in presence of H2O2

被引：25

作者：

Bonoldi, L

Busetto, C

Congiu, A

Marra, G

Ranghino, G

Salvalaggio, M

Spanò, G

Giamello, E

机构：

[1] Enichem Novara, I-28100 Novara, Italy

[2] Unita INFM Torino, I-10125 Turin, Italy

[3] IFM, Dipartimento Chim, I-10125 Turin, Italy

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2002年 / 58卷 / 06期

关键词：

TS-1; H2O2; ESR; ab initio calculations;

D O I：

10.1016/S1386-1425(01)00703-X

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

The interaction or H2O2 with TS-1 has been investigated by the ESR technique. A well manufactured TS-1 has been considered, where the presence of extra-structural titanium can be excluded. The two main signals observed are attributed to oxygen radical species co-ordinated on structural titanium sites, and the relevant effect of water presence in the paramagnetic complex is discussed. A comparison is performed with O-2(-)/Ti species in TS-1 obtained by reduction/re-oxidation procedures of Ti(IV). Moreover, some possible structural configurations of the paramagnetic sites are proposed, for two of which ab initio calculation yield g.-values quite close to the experimental ones. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：1143 / 1154

页数：12

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