期刊
JOURNAL OF CATALYSIS
卷 276, 期 1, 页码 123-133出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2010.09.004
关键词
Mesoporous material; N-heterocyclic carbene; Suzuki-Miyaura coupling; Aryl chloride; SBA 16
资金
- New Teacher Foundation from Education Ministry of China [200801081035]
- Shanxi Natural Science Foundation for Youths [2009021009]
- Natural Science Foundation of China [NSF20903064]
- Shanxi University
- Jiangsu Key Lab of Fine Petrochemistry [KF0802]
New cubic cage-like mesoporous materials with a bulky N-heterocyclic carbene [IPr 1 3-bis(2 6-diisopro pylphenyl)imidazol-2-ylidene] precursor in the framework were synthesized by a co-condensation of IPr precursor-bridged organosilane and TEOS in the presence of template N-2 sorption XRD and TEM characterizations revealed that the mesostructural orderings of the synthesized materials depended on the molar fraction of the bridged organosilane in the initial gel mixture With the Increase in the molar fraction of the organosilane from 2 5% to 15% the mesostructure of the synthesized material changed from a well-ordered 3D ordered structure to a amorphous structure FT-IR and solid-state NMR characterizations confirmed that IPr carbene precursor was covalently integrated with the solid materials Such hybrid materials were able to coordinate Pd(acac)(2) leading to active solid catalysts for Suzuki-Miyaura couplings of less reactive aryl chlorides The solid catalyst could be reused 8 times without a significant decrease in activity Furthermore the solid catalyst was active for the coupling of C(sp(3))-chlorides and arylboronic acids (C) 2010 Elsevier Inc All rights reserved
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