title: ZnAl-Hydrotalcite-Supported Au25Nanoclusters as Precatalysts for Chemoselective Hydrogenation of 3-Nitrostyrene.
abstract: Chemoselective hydrogenation of 3-nitrostyrene to 3-vinylaniline is quite challenging because of competitive activation of the vinyl group and the nitro group over most supported precious-metal catalysts. A precatalyst comprised of thiolated Au25nanoclusters supported on ZnAl-hydrotalcite yielded gold catalysts of a well-controlled size (ca. 2.0 nm)-even after calcination at 500 °C. The catalyst showed excellent selectivity (>98 %) with respect to 3-vinylaniline, and complete conversion of 3-nitrostyrene over broad reaction duration and temperature windows. This result is unprecedented for gold catalysts. In contrast to traditional catalysts, the gold catalyst is inert with respect to the vinyl group and is only active with regard to the nitro group, as demonstrated by the results of the control experiments and attenuated total reflection infrared spectra. The findings may extend to design of gold catalysts with excellent chemoselectivity for use in the synthesis of fine chemicals.
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Tan
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Xiao Yan
authors.initials: XY
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Leilei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Aiqin
authors.initials: A
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Shu
authors.initials: S
authors.lastname: Miao
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.|Department of Applied Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo, 192-0397, Japan.
authors.forename: Masatake
authors.initials: M
authors.lastname: Haruta
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Haisheng
authors.initials: H
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Fangjun
authors.initials: F
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Catalysis, iChEM, Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang
keywords: 3-nitrostyrene; ZnAl-hydrotalcite; gold nanoclusters; hydrogenation; supported catalysts