The use of palladium nanoparticles supported with MCM-41 and basic (Al)MCM-41 mesoporous sieves in microwave-assisted Heck reaction

被引：28

作者：

Demel, Jan ^{[1
,2
]}

Park, Sang-Eon ^{[3
]}

Cejka, Jiri ^{[2
]}

Stepnicka, Petr ^{[1
]}

机构：

[1] Charles Univ Prague, Fac Sci, Dept Inorgan Chem, Prague 12840 2, Czech Republic

[2] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CR-18223 Prague 8, Czech Republic

[3] Inha Univ, Nano Ctr Fine Chem Fus Technol, Dept Chem, Lab Nano Green Catalysis, Inchon 402751, South Korea

来源：

CATALYSIS TODAY | 2008年 / 132卷 / 1-4期

关键词：

bifunctional catalysts; supported catalysts; palladium; nanoparticles; MCM-41; heck reaction; microwaves;

D O I：

10.1016/j.cattod.2007.12.007

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of supported catalysts has been obtained by grafting of chemically generated palladium nanoparticles onto basic, Cs+ ion-exchanged molecular sieves (Al)MCM-41 and onto the non-basic, parent material MCM-41. Catalytic activity of the catalysts has been investigated in the Heck reaction between bromobenzene and butyl acrylate under microwave irradiation. The activity of the bifunctional catalysts (Pd@Cs+-(Al)MCM-41) and the activity of Pd@MCM-41 combined with sodium acetate as an external base were considerably higher under microwave irradiation than activities observed for the same catalytic systems under the conventional heating. The Pd@MCM-41/NaOAc system showed higher conversions than the bifunctional catalysts presumably due to a different nature and accessible amount of the base. On the other hand, microwave irradiation seems to increase the rate of aggregation of the metallic particles and thus also catalyst deactivation as compared with the usual heating. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：63 / 67

页数：5

共 32 条

[1] Microwave-promoted Heck coupling using ultralow metal catalyst concentrations [J].