Highly Dispersed Pd Species Active in the Suzuki-Miyaura Reaction

被引：22
|
作者：
Okumura, Kazu [1 ]
Matsui, Hirosuke [1 ]
Tomiyama, Takuya [1 ]
Sanada, Takashi [1 ]
Honma, Tetsuo [2 ]
Hirayama, Sayaka [2 ]
Niwa, Miki [1 ]
机构：
[1] Tottori Univ, Grad Sch Engn, Dept Chem & Biotechnol, Minami Ku, Tottori, Japan
[2] Japan Synchroton Radiat Res Inst SPring 8, Sayo, Hyogo 6795198, Japan
来源：
CHEMPHYSCHEM | 2009年 / 10卷 / 18期
基金：
日本学术振兴会;
关键词：
EXAFS spectroscopy; palladium; Suzuki-Miyaura reaction; X-ray absorption spectroscopy; zeolites; CROSS-COUPLING REACTIONS; N-HETEROCYCLIC CARBENES; PALLADIUM NANOPARTICLES; METAL NANOPARTICLES; ARYL CHLORIDES; HECK REACTION; USY ZEOLITE; CATALYSTS; ADSORPTION; COMPLEXES;
D O I：
10.1002/cphc.200900711
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：
Structures of Pd/zeolites immersed in solvents were measured by in situ X-ray absorption fine structure (XAFS). Systematic studies revealed that the selection of an appropriate support (USY-zeolite), thermal treatment temperature of USY, solvent (o-xylene), H-2 partial pressure (6%), and the use of a Pd amine complex affect the structure of Pd. As a result, we found that monomeric Pd can be obtained in the USY support with H-2 bubbling in o-xylene. The structural properties of Pd correlate well with its catalytic performance in the Suzuki-Miyaura coupling reactions; a very high TON of up to 11000 000 was obtained over the monomeric Pd.
引用
收藏
页码：3265 / 3272
页数：8
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