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Self‐Assembled Magnetic Gold Catalysts from Dual‐Functional Boron Clusters
Author(s) -
Qi Bin,
Wu Chenchen,
Li Xin,
Wang Dan,
Sun Liang,
Chen Bo,
Liu Wenjing,
Zhang Haibo,
Zhou Xiaohai
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201702011
Subject(s) - catalysis , aniline , materials science , nanoparticle , colloidal gold , boron , nanotechnology , chemical engineering , supramolecular chemistry , selectivity , reducing agent , one pot synthesis , nanocomposite , chemistry , organic chemistry , crystal structure , engineering
Abstract A new class of core–shell magnetic gold nanocomposites is prepared in a raspberry‐like fashion by the controlled supramolecular host–guest assembly of γ‐cyclodextrins (γ‐CDs) and boron clusters. In this work, Cs 2 [ closo ‐B 12 H 12 ], a fundamental boron cluster, can play a dual role in the preparation of highly monodispersed Au nanoparticles and in the immobilization of Au nanoparticles on the γ‐CDs@Fe 3 O 4 surface as an effective anchor. This facile and spontaneous supramolecular strategy allows for the control of the size and composition of the highly stable gold composites. Furthermore, the obtained AuNPs@Fe 3 O 4 composites exhibit an excellent catalytic activity and recyclability for the selective reduction of nitroaromatics to their corresponding aniline compounds, and the fastest reaction can be achieved within 20 s with a high conversion and selectivity at room temperature, which is better than that obtained previously in studies on metal nanoparticle composites as catalysts.