Zirconia-supported sodium decatungstate (Na4W10O32/ZrO2):: An efficient, green and recyclable photocatalyst for selective oxidation of activated alcohols to carbonyl compounds with O2

被引：23

作者：

Farhadi, Saeid ^{[1
]}

Momeni, Zohreh ^{[1
]}

机构：

[1] Univ Lorestan, Dept Chem, Khorramabad 68135, Iran

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2007年 / 277卷 / 1-2期

关键词：

benzylic alcohols; photocatalyst; oxidation; sol-gel technique; zirconia-supported; sodium decatungstate;

D O I：

10.1016/j.molcata.2007.07.024

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：

Zirconia-supported sodium decatungstate, Na4W10O32/ZrO2, was prepared by incorporating Na4W10O32 cluster into zirconia matrix via a sol-gel technique and used as a green and recyclable heterogeneous photocatalyst for oxidation of a variety of benzylic alcohols with O-2 in CH3CN which resulted in the corresponding aldehydes and ketones selectively in moderate to excellent yields. High inter- and intra-molecular chemoselectivities were observed when benzylic OH groups were oxidized in the presence of aliphatic OH groups. Non-benzylic alcohols were less reactive under the conditions established here. The photocatalyst has been reused several times, without observable loss of activity and selectivity. Heterogeneous photocatalyst is more active than the unsupported Na4W10O32. (c) 2007 Elsevier B.V. All rights reserved.

引用

收藏

页码：47 / 52

页数：6

相关论文

共 41 条

[1] Heteropolytungstic acid (H3PW12O40)-encapsulated into the titanium-exchanged HY (TiHY) zeolite:: a novel photocatalyst for photoreduction of methyl orange [J].

Anandan, S ;

Ryu, SY ;

Cho, WJ ;

Yoon, M .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2003, 195 (1-2) :201-208

[2] COMPARATIVE-STUDY OF POLYOXOMETALATES AND SEMICONDUCTOR METAL-OXIDES AS CATALYSTS - PHOTOCHEMICAL OXIDATIVE-DEGRADATION OF THIOETHERS [J].

CHAMBERS, RC ;

HILL, CL .

INORGANIC CHEMISTRY, 1991, 30 (13) :2776-2781

[3] REDOX CATALYSIS INVOLVING SUBSTRATE PHOTOOXIDATION WITH CATALYST REGENERATION BY SUBSTRATE REDUCTION - SIMULTANEOUS OXIDATIVE C-H BOND-CLEAVAGE AND REDUCTIVE C-S BOND-CLEAVAGE IN THIOETHERS CATALYZED BY W10O32(4-) [J].

CHAMBERS, RC ;

HILL, CL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1990, 112 (23) :8427-8433

[4] ELECTROCHEMICAL AND PHOTOCHEMICAL REDUCTION OF DECATUNGSTATE - A REINVESTIGATION [J].

CHEMSEDDINE, A ;

SANCHEZ, C ;

LIVAGE, J ;

LAUNAY, JP ;

FOURNIER, M .

INORGANIC CHEMISTRY, 1984, 23 (17) :2609-2613

[5] EARLY-TIME DYNAMICS AND REACTIVITY OF POLYOXOMETALATE EXCITED-STATES - IDENTIFICATION OF A SHORT-LIVED LMCT EXCITED-STATE AND A REACTIVE LONG-LIVED CHARGE-TRANSFER INTERMEDIATE FOLLOWING PICOSECOND FLASH EXCITATION OF [W10O32](4-) IN ACETONITRILE [J].

DUNCAN, DC ;

NETZEL, TL ;

HILL, CL .

INORGANIC CHEMISTRY, 1995, 34 (18) :4640-4646

[6]

Farhadi S, 2006, ACTA CHIM SLOV, V53, P72

[7] Photocatalytic oxidation of primary and secondary benzylic alcohols to carbonyl compounds catalyzed by H3PW12O40/SiO2 under an O2 atmosphere [J].

Farhadi, S ;

Afshari, M ;

Maleki, M ;

Babazadeh, Z .

TETRAHEDRON LETTERS, 2005, 46 (49) :8483-8486

[8] ONE-POT 2-STEPS SYNTHESIS OF 1,2-DIOL [J].

FRINGUELLI, F ;

GERMANI, R ;

PIZZO, F ;

SAVELLI, G .

SYNTHETIC COMMUNICATIONS, 1989, 19 (11-12) :1939-1943

[9] Heterogeneous photodegradation of aqueous hydroxy butanedioic acid by microporous polyoxometalates [J].

Guo, YH ;

Hu, CW ;

Jiang, SC ;

Guo, CX ;

Yang, Y ;

Wang, E .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2002, 36 (01) :9-17

[10] Photocatalytic degradation of aqueous organocholorine pesticide on the layered double hydroxide pillared by Paratungstate A ion, Mg12Al6(OH)36(W7O24)•4H2O [J].

Guo, YH ;

Li, DF ;

Hu, CW ;

Wang, YH ;

Wang, EB ;

Zhou, YC ;

Feng, SH .

APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 30 (3-4) :337-349

← 1 2 3 4 5 →