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Immobilization of an Aminobisphosphine–Pd II Complex over Graphene Oxide: An Efficient and Reusable Catalyst for Suzuki–Miyaura, Ullmann Coupling and Cyanation Reactions
Author(s) -
Sengupta Debasish,
Pandey Madhusudan K.,
Mondal Dipanjan,
Radhakrishna Latchupatula,
Balakrishna Maravanji S.
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800291
Subject(s) - chemistry , cyanation , catalysis , palladium , oxide , heterogeneous catalysis , suzuki reaction , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , nuclear chemistry , graphene , coupling reaction , inorganic chemistry , polymer chemistry , organic chemistry , chemical engineering , engineering
The grafting of an aminobis(phosphine)–Pd II complex (PNP–Pd II ) [PdCl 2 {(Ph 2 P) 2 N(CH 2 ) 3 Si(OMe) 3 }] ( 2 ) on graphene oxide (GO) has been carried out by a condensation reaction between methoxysilane groups of 2 and hydroxyl groups of GO. The composite material was characterized by FTIR spectroscopy , solid‐state 31 P NMR spectroscopy, SEM, TEM, XPS and ICP‐AES techniques. All these tools support the clean immobilization of compound 2 on GO. The composite material showed high catalytic activity in Suzuki–Miyaura, Ullmann coupling and cyanation reactions. The heterogeneity of the composite was confirmed by a hot filtration test. The immobilized PNP–Pd II shows comparable activity to its homogeneous analogue 2 . The recycling ability of the catalyst was examined for five consecutive runs, which showed little or no reduction in its catalytic efficiency.