Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction
Quasi-homogeneous ligand-protected gold nanoclusters (Au NCs) with atomic precision and well-defined structure offer a great opportunity for exploring the catalytic nature of nanogold catalysts at a molecular level. Herein, using real-time electrospray ionization mass spectrometry (ESI-MS), we have...
| Main Authors: | , , , , , |
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| Format: | Proceeding Paper |
| Language: | English English |
| Published: |
2019
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| Online Access: | http://irep.iium.edu.my/78191/ http://irep.iium.edu.my/78191/3/78191%20schedule.pdf http://irep.iium.edu.my/78191/4/78191%20Structural%20transformation%20and%20ligand%20dynamic.pdf |
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| author | Nasaruddin, Ricca Rahman Yao, Qiaofeng Chen, Tiankai Hülsey, Max J. Yan, Ning Xie, Jianping |
| author_facet | Nasaruddin, Ricca Rahman Yao, Qiaofeng Chen, Tiankai Hülsey, Max J. Yan, Ning Xie, Jianping |
| author_sort | Nasaruddin, Ricca Rahman |
| building | IIUM Repository |
| collection | Online Access |
| description | Quasi-homogeneous ligand-protected gold nanoclusters (Au NCs) with atomic precision and well-defined structure offer a great opportunity for exploring the catalytic nature of nanogold catalysts at a molecular level. Herein, using real-time electrospray ionization mass spectrometry (ESI-MS), we have successfully identified the desorption and re-adsorption of p-mercaptobenzoic acid (p-MBA) ligands from Au25(p-MBA)18 NC catalysts during the hydrogenation of 4-nitrophenol in solution. This ligand dynamic (desorption and re-adsorption) would initiate structural transformation of Au25(p-MBA)18 NC catalysts during the reaction, forming a mixture of smaller Au NCs (Au23(p-MBA)16 as the major species) at the beginning of catalytic reaction, which could further be transformed into larger Au NCs (Au26(p-MBA)19 as the major species). The adsorption of hydrides (from NaBH4) is identified as the determining factor that could induce the ligand dynamic and structural transformation of NC catalysts. This study provides fundamental insights into the catalytic nature of Au NCs, including catalytic mechanism, active species and stability of Au NC catalysts during a catalytic reaction. |
| first_indexed | 2025-11-14T17:42:54Z |
| format | Proceeding Paper |
| id | iium-78191 |
| institution | International Islamic University Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-14T17:42:54Z |
| publishDate | 2019 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | iium-781912020-03-06T04:09:14Z http://irep.iium.edu.my/78191/ Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction Nasaruddin, Ricca Rahman Yao, Qiaofeng Chen, Tiankai Hülsey, Max J. Yan, Ning Xie, Jianping QD Chemistry TP Chemical technology TP155 Chemical engineering Quasi-homogeneous ligand-protected gold nanoclusters (Au NCs) with atomic precision and well-defined structure offer a great opportunity for exploring the catalytic nature of nanogold catalysts at a molecular level. Herein, using real-time electrospray ionization mass spectrometry (ESI-MS), we have successfully identified the desorption and re-adsorption of p-mercaptobenzoic acid (p-MBA) ligands from Au25(p-MBA)18 NC catalysts during the hydrogenation of 4-nitrophenol in solution. This ligand dynamic (desorption and re-adsorption) would initiate structural transformation of Au25(p-MBA)18 NC catalysts during the reaction, forming a mixture of smaller Au NCs (Au23(p-MBA)16 as the major species) at the beginning of catalytic reaction, which could further be transformed into larger Au NCs (Au26(p-MBA)19 as the major species). The adsorption of hydrides (from NaBH4) is identified as the determining factor that could induce the ligand dynamic and structural transformation of NC catalysts. This study provides fundamental insights into the catalytic nature of Au NCs, including catalytic mechanism, active species and stability of Au NC catalysts during a catalytic reaction. 2019 Proceeding Paper NonPeerReviewed application/pdf en http://irep.iium.edu.my/78191/3/78191%20schedule.pdf application/pdf en http://irep.iium.edu.my/78191/4/78191%20Structural%20transformation%20and%20ligand%20dynamic.pdf Nasaruddin, Ricca Rahman and Yao, Qiaofeng and Chen, Tiankai and Hülsey, Max J. and Yan, Ning and Xie, Jianping (2019) Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction. In: Southeast Asia Catalysis Conference, 23rd - 24th May 2019, Singapore. (Unpublished) |
| spellingShingle | QD Chemistry TP Chemical technology TP155 Chemical engineering Nasaruddin, Ricca Rahman Yao, Qiaofeng Chen, Tiankai Hülsey, Max J. Yan, Ning Xie, Jianping Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction |
| title | Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction |
| title_full | Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction |
| title_fullStr | Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction |
| title_full_unstemmed | Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction |
| title_short | Structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction |
| title_sort | structural transformation and ligand dynamic of gold nanocluster during a catalytic reaction |
| topic | QD Chemistry TP Chemical technology TP155 Chemical engineering |
| url | http://irep.iium.edu.my/78191/ http://irep.iium.edu.my/78191/3/78191%20schedule.pdf http://irep.iium.edu.my/78191/4/78191%20Structural%20transformation%20and%20ligand%20dynamic.pdf |