Vanadium(IV) complexes with picolinic acids in NaY zeolite cages - Synthesis, characterization and catalytic behaviour

被引：26

作者：

Kozlov, A

Asakura, K

Iwasawa, Y ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Sci, Dept Chem, Bunkyo Ku, Tokyo 113, Japan

[2] Univ Tokyo, Fac Sci, Res Ctr Spectrochem, Bunkyo Ku, Tokyo 113, Japan

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1998年 / 94卷 / 06期

关键词：

D O I：

10.1039/a706679a

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：

Encapsulated vanadium picolinic complexes have been synthesized by treatment of a dehydrated form of VO2+-NaY zeolite with molten picolinic acids and characterized by X-ray photoelectron spectroscopy (XPS), extended X-ray absorption fine structure (EXAFS), X-ray absorption near-edge structure (XANES), EPR, FTIR and UV-VIS spectroscopies, and XRD. It was suggested by XRD and XPS that the complexes were located in the zeolite cavities. Differences in the spectroscopic properties of encapsulated and impregnated samples were explained in terms of coordination of vanadium complexes with zeolite -OH groups. The stability of VO(pic)(2) and its adduct with pyridine depended strongly on the complex location. The encapsulated vanadium picolinate complex retained solution-like activity in the liquid-phase oxidation of hydrocarbons and alcohols with hydrogen peroxide.

引用

页码：809 / 816

页数：8

共 40 条

[31] OXIDATIONS BY THE REAGENT H2O2-VANADIUM COMPLEX-PYRAZINE-2-CARBOXYLIC ACID .4. OXIDATION OF ALKANES, BENZENE AND ALCOHOLS BY AN ADDUCT OF H2O2 WITH UREA [J].