| Project/Area Number |
16K13957
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 配位高分子 / らせん構造 / 金 / 発光 / 超分子化学 / 高分子合成 / 自己組織化 |
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| Outline of Final Research Achievements |
Gold(I)-thiolate coordination polymers have attracted continuing interests in relation to the applications for pharmaceuticals and their photoluminescence activities. In this research, we studied the synthesis and optical properties of soluble gold(I)-thiolate coordination polymer by using polyethylene glycol (PEG)-modified alkanethiols, and show that the superstructure formation of the polymer chains leads to the appearance of intense photoluminescence due to the interchain aurophilic interaction. When the thiol possesses a long alkyl chain between the terminal PEG and S atom, the AuSR species generated at the initial stage were photoluminescence inactive, but became photoluminescent after being annealed in water. In contrast, Such PL evolution was not observed when the alkyl spacer was swapped with shorter ones, implying the critical roles of the alkyl packing interactions in the controlled formation of superstructure held by aurophilic interactions.
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| Academic Significance and Societal Importance of the Research Achievements |
直鎖状の金チオラート配位高分子は薬剤や発光材料との関連で関心が持たれている。本研究で配位子の有機ユニットの自己組織構造形成を基軸とするアプローチを展開したところ、ポリエチレングリコール鎖を導入して水や各種有機溶媒への親和性を向上させた種々の長鎖アルカンチオラートを用いた場合に、高分子鎖間での金原子間相互作用に由来する強い発光が観察され、二重ラセン構造のような複数の高分子鎖が集合した高次構造が溶液中で形成されることを見出した。また本研究によって有機配位子の設計で直鎖配位高分子のサイズ、高次構造が制御できることを示すことが明らかにされ、今後の機能物質設計に有用な情報が得られた。
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