2012 Fiscal Year Final Research Report
Multimetallic cluster complexes as well-defined nano-scale catalysts for novel organic transformations
| Project/Area Number |
21245027
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Synthetic chemistry
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| Research Institution | Osaka University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
OHSHIMA Takashi 大阪大学, 基礎工学研究科, 准教授 (10313123)
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| Project Period (FY) |
2009 – 2012
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| Keywords | クラスター / ナノ触媒 / 触媒反応 / ナノ反応場 / 多核金属錯体 |
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| Research Abstract |
Multimetallic cluster complexes have been extensively studied due to their applicability of proximal metal centers as a reactive site for unique organic transformations. We previously reported a tetranuclear zinc cluster catalyzed selective trans-esterification in the presence of amine functionalities, and the selectivity was opposite trend to the cluster catalyst free reaction condition. Based on the unique reactivity of the tetranuclear zinc cluster, we applied several multimetallic cluster complexes as catalysts for ester transformations. During our research, we found that the mixture of multimetallic clusters and nitrogen-based ligands led to the formation of highly reactive species after the coordination of the ligands to the cluster motif. Such enhancement effects were observed in zinc cluster catalyzed several ester transformations, and in addition, octanuclear cobalt clusters became an excellent catalyst for trans-esterification upon addition of 2,2’-bipyridine. Therefore, such cluster transformation during the catalytic reaction by using additional ligands is general strategy for showing high catalytic performance.
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