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Assembly of Multiple Components in a Hybrid Microcapsule: Designing a Magnetically Separable Pd Catalyst for Selective Hydrogenation
Author(s) -
Amali Arlin Jose,
Sharma Bikash,
Rana Rohit Kumar
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201402467
Subject(s) - catalysis , selectivity , nanoparticle , chemical engineering , nanotechnology , fabrication , chemistry , materials science , economies of agglomeration , magnetic nanoparticles , organic chemistry , medicine , alternative medicine , pathology , engineering
In analogy to the role of long‐chain polyamines in biosilicification, poly‐ L ‐lysine facilitates the assembly of nanocomponents to design multifunctional microcapsule structures. The method is demonstrated by the fabrication of a magnetically separable catalyst that accommodates Pd nanoparticles (NPs) as active catalyst, Fe 3 O 4 NPs as magnetic component for easy recovery of the catalyst, and silica NPs to impart stability and selectivity to the catalyst. In addition, polyamines embedded inside the microcapsule prevent the agglomeration of Pd NPs and thus result in efficient catalytic activity in hydrogenation reactions, and the hydrophilic silica surface results in selectivity in reactions depending on the polarity of substrates.