H6GeMo10V2O40•16H2O Nanoparticles Prepared by Hydrothermal Method: A New and Reusable Heteropoly Acid Catalyst for Highly Efficient Acetylation of Alcohols and Phenols under Solvent-Free Conditions

被引：11

作者：

Farhadi, Saeid ^{[1
]}

Zareisahamieh, Reza ^{[2
]}

Zaidi, Masoumeh ^{[1
]}

机构：

[1] Lorestan Univ, Dept Chem, Khorramabad 68135465, Iran

[2] Lorestan Univ, Fac Sci, Khorramabad 68135465, Iran

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2011年 / 22卷 / 07期

关键词：

heteropoly acid; nanoparticles; acetylation; alcohols; solvent-free conditions; RECYCLABLE HETEROGENEOUS CATALYST; ACETIC-ANHYDRIDE; POWERFUL CATALYST; LEWIS-ACID; ACYLATION REACTIONS; VERSATILE CATALYST; FUNCTIONAL-GROUPS; MIXED ANHYDRIDES; SULFURIC-ACID; SILICA-GEL;

D O I：

10.1590/S0103-50532011000700018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new Keggin-type heteropoly acid, namely decamolybdodivanadogermanic acid (H6GeMo10V2O40 center dot 16H(2)O), with nanosized particles (5-8 nm), has been synthesized by a hydrothermal method and characterized by elemental analysis, thermogravimetric analysis (TGA), powder X-ray diffractometry (XRD), Fourier-transform infrared spectroscopy (FTIR), UV-Visible spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and potentiometric titration. H6GeMo10V2O40 center dot 16H(2)O revealed high catalytic activity for acetylation of various alcohols and phenols with acetic anhydride at room temperature (298 +/- 2 K) and under solvent-free conditions. The catalyst can be easily recovered and used repeatedly for five cycles with a slight loss of activity. The catalytic activity of H6GeMo10V2O40 center dot 16H(2)O was higher than that of other Keggin-type heteropoly acids, such as H3PW12O40, H3PMo12O40 and H4SiW12O40.

引用

页码：1323 / 1332

页数：10

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