N-Heterocyclic Carbene-Functionalized Gold Nanoclusters
| Project/Area Number |
19F19741
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 外国 |
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| Review Section |
Basic Section 34010:Inorganic/coordination chemistry-related
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| Research Institution | Nagoya University |
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Principal Investigator |
CRUDDEN Cathleen 名古屋大学, トランスフォーマティブ生命分子研究所, 客員教授 (10721029)
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| Co-Investigator(Kenkyū-buntansha) |
OSTEN KIMBERLY 名古屋大学, トランスフォーマティブ生命分子研究所, 外国人特別研究員
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| Project Period (FY) |
2019-07-24 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2019: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Nano Materials / Nanocluster / N-Heterocyclic Carbene / Gold |
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| Outline of Research at the Start |
We were prompted to investigate the effects of introducing NHCs as stabilizing ligands on gold nanoclusters, with the goal of utilizing them for interesting catalytic applications. To generate nanoclusters with catalytic activity, we will attempt the removal of ligands by various ligand-abstracting agents. After conducting the above tests on cluster activation by ligand removal, we will move on to testing their activity for C-H oxidation catalysis, with a focus on establishing trends in activity and selectivity towards the oxidation of different substrates based on cluster size and charge.
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| Outline of Annual Research Achievements |
More recently, we have been working to expand the use of NHCs to the stabilization of gold nanoclusters. Following our initial report on the synthesis and isolation of [Au13(NHC)9Cl3]Cl2 clusters, we improved the isolation and purification procedures further in order to apply these clusters as catalysts in various reactions.
And structures of clusters was confirmed by X-ray crystallographic analysis. After developing optimized procedures for the synthesis and purification of these clusters, we sought to test their activity in oxidation catalysis, along with our previously isolated NHC-phosphine ligated clusters. Towards this end we chose two model reactions, benzyl alcohol oxidation and photocatalytic benzyl amine oxidation as test cases. Benzyl alcohol oxidation using mixed phosphine/NHC Au13 clusters proceeds with moderate turnover frequency (average 7 h-1), producing benzaldehyde with high selectivity (average 95%). Due to the low stability of these clusters under catalytic conditions, we are currently investigating increasing their stability via solid supports and/or ligand modifications. We plan to also investigate other novel catalytic reactions using our family of NHC-functionalized gold nanoclusters in future research.
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| Research Progress Status |
令和元年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和元年度が最終年度であるため、記入しない。
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Report
(1 results)
Research Products
(3 results)
