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Mechanistic Studies of Magnetically Recyclable PdFe 3 O 4 Heterodimeric Nanocrystal‐Catalyzed Organic Reactions
Author(s) -
Byun Sangmoon,
Chung Jooyoung,
Kwon Jungmin,
Moon Kim B.
Publication year - 2015
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201403201
Subject(s) - catalysis , sonogashira coupling , chemistry , nanocrystal , coupling reaction , homogeneous , organic reaction , heck reaction , heterogeneous catalysis , nanoparticle , homogeneous catalysis , redox , reaction mechanism , phase (matter) , combinatorial chemistry , palladium , chemical engineering , nanotechnology , materials science , organic chemistry , thermodynamics , physics , engineering
Recently, we have reported several catalytic applications of new PdFe 3 O 4 heterodimeric nanocrystals as magnetically separable catalysts. Successful applications of the nanocrystals towards various useful organic reactions such as Suzuki, Heck, and Sonogashira coupling reactions, direct CH arylation, and Wacker oxidation have been recorded. However, detailed mechanistic courses of the reactions have not been delineated, and it was not clear whether these processes proceeded through a homogeneous or heterogeneous mechanism. Here, we report detailed mechanistic investigations of the reactions employing the PdFe 3 O 4 nanoparticle catalysts. Suzuki coupling and Wacker oxidation reactions were chosen as two representative heterogeneous reactions employing the PdFe 3 O 4 catalysts, and general kinetic studies, hot filtration tests, and three‐phase tests were carried out for the two reactions. The studies showed that the reactions most probably proceed via a solution‐phase mechanism.