Photoinduced macroscopic polarization change with long-lived metastable state
| Project/Area Number |
21K05085
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 34010:Inorganic/coordination chemistry-related
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| Research Institution | Kyushu University |
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Principal Investigator |
SU SHENGQUN 九州大学, 先導物質化学研究所, 学術研究員 (90817496)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | polarization change / spin transition / photoexcitation / charge transfer / electric current / ion displacement / photo effect |
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| Outline of Research at the Start |
We propose an approach towards light-induced polarization switching in a single crystal of spin crossover complexes with light-induced excited spin-state trapping effect, in which long-lived metastable states with different polarization can be generated by direct excitation upon irradiation with suitable light. Moreover, we expect to identify the differences in the chemical and electronic structures between ground states and excited states for unraveling the mechanism of this process. This project will also pave the way towards highly efficient energy conversion from light to electricity.
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| Outline of Annual Research Achievements |
The proposed research aims at developing molecular crystals with photo-induced macroscopic polarization change with current output during the relaxation process from excited state to the ground state. We focused on the spin crossover complexes with Light-Induced Excited Spin-State Trapping effect and Prussian blue analogues with photo-induced electron-transfer-coupled spin transition process. We have obtained a polar Fe(II) spin crossover complex and a trinuclear [Fe2Co] Prussian blue analogue with photo-response. During relaxation process, the output current was observed as expected. This study will benefit the development of multifunctional optoelectronic materials and energy conversion materials.
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Report
(3 results)
Research Products
(10 results)
