2020 Fiscal Year Research-status Report
Design and synthesis of responsive, elastic, porous single crystalline materials using mechanically interlocked molecules
| Project/Area Number |
20K15251
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
メン ウェンジン 国立研究開発法人物質・材料研究機構, 機能性材料研究拠点, 研究員 (30838470)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | Catenane |
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| Outline of Annual Research Achievements |
A series of catenane molecules which could potentially act as two-way linkers are designed. The synthesis of such molecules, however, was highly challenging. Catenanes containing ethylene glycol units are reported in the literature, but the synthesis of analogous molecule with the functional group required in this work produced very low yield. The purification was also difficult due to the presence of by products with similar property. When longer ethylene glycol chain was introduced, the yield of the desired catenane was improved, allowing two target catenanes being successfully prepared. However, in this design rings are larger and the whole molecule becomes more flexible. These features led to the formation of amorphous precipitate more readily than single crystals.
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| Current Status of Research Progress |
Current Status of Research Progress
3: Progress in research has been slightly delayed.
Reason
It was expected that the synthesis of the suitable catenanes would be challenging. Therefore, it is not surprising several designs need to be tested in order to understand the keys to a successful design.
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| Strategy for Future Research Activity |
Molecules with limited flexibility may be able to facilitate the growth of single crystal. Therefore, in the future, the synthesis of more compact catenanes will be tried.
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| Causes of Carryover |
Funding will be used to purchase necessary chemicals and lab equipment and pay for the user fees for common equipment.
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