Soft, oxidative stripping of alkyl thiolate ligands from hydroxyapatite-supported gold nanoclusters for oxidation reactions

Bin Zhang; Jun Fang; Jingguo Li; Jun Jie Lau; Davide Mattia; Ziyi Zhong; Jianping Xie; Ning Yan

doi:10.1002/asia.201501074

Soft, oxidative stripping of alkyl thiolate ligands from hydroxyapatite-supported gold nanoclusters for oxidation reactions

Bin Zhang, Jun Fang, Jingguo Li, Jun Jie Lau, Davide Mattia, Ziyi Zhong, Jianping Xie, Ning Yan

Research output: Contribution to journal › Article › peer-review

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Abstract

A strategy for the mild deprotection of alkyl-thiolated (6-mercaptohexanoic acid, MHA, and 3-mercaptopropanoic acid, MPA) gold nanoclusters (AuNCs) supported on hydroxyapatite (HAP) has been developed by employing a peroxide (tert-butyl hydroperoxide, TBHP, or hydrogen peroxide, H₂O₂) as an oxidant. The thiol ligands on the supported AuNCs 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 AuNCs that were supported on HAP for comparison, and the resulting AuNCs that were prepared by using this new strategy showed superior catalytic activity.

Original language	English
Pages (from-to)	532-539
Number of pages	8
Journal	Chemistry - An Asian Journal
Volume	11
Issue number	4
Early online date	2 Dec 2015
DOIs	https://doi.org/10.1002/asia.201501074
Publication status	Published - 18 Feb 2016

Keywords

gold
nanoclusters
oxidation
S ligands
synthetic methods

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10.1002/asia.201501074

http://dx.doi.org/10.1002/asia.201501074

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title = "Soft, oxidative stripping of alkyl thiolate ligands from hydroxyapatite-supported gold nanoclusters for oxidation reactions",

abstract = "A strategy for the mild deprotection of alkyl-thiolated (6-mercaptohexanoic acid, MHA, and 3-mercaptopropanoic acid, MPA) gold nanoclusters (AuNCs) supported on hydroxyapatite (HAP) has been developed by employing a peroxide (tert-butyl hydroperoxide, TBHP, or hydrogen peroxide, H2O2) as an oxidant. The thiol ligands on the supported AuNCs 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 AuNCs that were supported on HAP for comparison, and the resulting AuNCs that were prepared by using this new strategy showed superior catalytic activity.",

keywords = "gold, nanoclusters, oxidation, S ligands, synthetic methods",

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doi = "10.1002/asia.201501074",

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T1 - Soft, oxidative stripping of alkyl thiolate ligands from hydroxyapatite-supported gold nanoclusters for oxidation reactions

AU - Zhang, Bin

AU - Fang, Jun

AU - Li, Jingguo

AU - Lau, Jun Jie

AU - Mattia, Davide

AU - Zhong, Ziyi

AU - Xie, Jianping

AU - Yan, Ning

PY - 2016/2/18

Y1 - 2016/2/18

N2 - A strategy for the mild deprotection of alkyl-thiolated (6-mercaptohexanoic acid, MHA, and 3-mercaptopropanoic acid, MPA) gold nanoclusters (AuNCs) supported on hydroxyapatite (HAP) has been developed by employing a peroxide (tert-butyl hydroperoxide, TBHP, or hydrogen peroxide, H2O2) as an oxidant. The thiol ligands on the supported AuNCs 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 AuNCs that were supported on HAP for comparison, and the resulting AuNCs that were prepared by using this new strategy showed superior catalytic activity.

AB - A strategy for the mild deprotection of alkyl-thiolated (6-mercaptohexanoic acid, MHA, and 3-mercaptopropanoic acid, MPA) gold nanoclusters (AuNCs) supported on hydroxyapatite (HAP) has been developed by employing a peroxide (tert-butyl hydroperoxide, TBHP, or hydrogen peroxide, H2O2) as an oxidant. The thiol ligands on the supported AuNCs 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 AuNCs that were supported on HAP for comparison, and the resulting AuNCs that were prepared by using this new strategy showed superior catalytic activity.

KW - gold

KW - nanoclusters

KW - oxidation

KW - S ligands

KW - synthetic methods

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UR - http://dx.doi.org/10.1002/asia.201501074

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DO - 10.1002/asia.201501074

M3 - Article

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SN - 1861-4728

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SP - 532

EP - 539

JO - Chemistry - An Asian Journal

JF - Chemistry - An Asian Journal

IS - 4

ER -

Soft, oxidative stripping of alkyl thiolate ligands from hydroxyapatite-supported gold nanoclusters for oxidation reactions

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Keywords

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