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Soft, Oxidative Stripping of Alkyl Thiolate Ligands from Hydroxyapatite‐Supported Gold Nanoclusters for Oxidation Reactions
Author(s) -
Zhang Bin,
Fang Jun,
Li Jingguo,
Lau Jun Jie,
Mattia Davide,
Zhong Ziyi,
Xie Jianping,
Yan Ning
Publication year - 2016
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.201501074
Subject(s) - nanoclusters , hydrogen peroxide , chemistry , catalysis , alkyl , styrene , benzyl alcohol , calcination , peroxide , polymer chemistry , alcohol oxidation , photochemistry , combinatorial chemistry , organic chemistry , copolymer , polymer
A strategy for the mild deprotection of alkyl‐thiolated (6‐mercaptohexanoic acid, MHA, and 3‐mercaptopropanoic acid, MPA) gold nanoclusters (Au NCs) supported on hydroxyapatite (HAP) has been developed by employing a peroxide ( tert ‐butyl hydroperoxide, TBHP, or hydrogen peroxide, H 2 O 2 ) as an oxidant. The thiol ligands on the supported Au NCs were removed after oxidation, and the size and integrity of the supported clusters were well‐preserved. The bare gold clusters on HAP after removal of the ligands were catalytically effective for the epoxidation of styrene and the aerobic oxidation of benzyl alcohol. These two reactions were also investigated on calcined Au NCs that were supported on HAP for comparison, and the resulting Au NCs that were prepared by using this new strategy showed superior catalytic activity.