期刊
APPLIED SURFACE SCIENCE
卷 427, 期 -, 页码 575-583出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.08.019
关键词
C-C coupling; Palladium catalysis; Poly(ionic liquid); Aerobic oxidation; Heterogeneous catalysis; Polyoxometallate
类别
资金
- National Natural Science Foundation of China [21476109, U1662107, 21136005, 21303084]
- Jiangsu Provincial Science Foundation for Youths [BK20130921, BK20160976]
- Specialized Research Fund for the Doctoral Program of Higher Education [20133221120002]
- China Postdoctoral Science Foundation [2016 M590447]
Multi-functional mesoporous poly(ionic liquid) (MPIL) containing pyridine-based ionic liquid (IL) moieties and adjacent double-COOH groups was synthesized through the free radical copolymerization of IL monomer N-propane sulfonate-4-vinylpyridine, maleic anhydride and divinylbenzene. Palladium(II) species were anchored on this MPIL support, affording the first efficient heterogeneous catalyst for the oxidative coupling of benzene to biphenyl under atmospheric oxygen at low temperature. The biphenyl yield of 15.0% (selectivity: 98.5%, turnover number: 62) was even higher than the one over the homogeneous counterpart palladium acetate. The catalyst can be facilely separated and reused. The IL moiety in the polymeric framework endowed the formation of immobilized palladium(II) species with high electrophilicity, which responds to the high performance. (C) 2017 Elsevier B.V. All rights reserved.
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