| Project/Area Number |
09640644
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Organic chemistry
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| Research Institution | HIMEJI INSTITUTE OF TECHNOLOGY |
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Principal Investigator |
NAKATSUJI Shin'ichi Himeji Institute of Technology, Department of Material Science, Faculty of Science, Professor, 理学部, 教授 (90124833)
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| Co-Investigator(Kenkyū-buntansha) |
安西 弘行 姫路工業大学, 理学部, 教授 (40222773)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
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| Keywords | Photo-Functionality / Magnetic Property / Conducting Property / Stable Radical / TEMPO Radical / Photochromism / Organic Donor / CT Complex / アントラセン / スピロピラン / ニトロキシドラジカル / フェルダジルラジカル / 電荷移動錯体 / X線構造解析 |
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| Research Abstract |
In order to develop organomagnetic materials with novel photo-functionality, we have tried to prepare series of photochromic compounds with stable radical substituents and we could successfully prepare series of spiropyran/merocyanine, norbornadiene/quadricyclane and anthracene/anthracene-dimer systems with stable radicals. Their structural changes have been found to occur by light/heat in solution but not in the solid-state. Although the tendency of the preservation of the magnetic interactions has been apparent in most of the latter two systems (norbornadiene/quadricyclane and anthracene/anthracene-dimer systems) albeit the change of the magnitude of the interactions, the switching behaviors of the magnetic interactions have been observed in some of the derivatives of spiropyran/merocyanine system. Further development of such photo-functional organomagnetic materials that exihit the switching behaviors in the solid-state is still in progress in our laboratory.
We have found that some sorts of stable radicals such as TEMPO radicals or verdazyl radicals work as organic donors to form CT complexes with appropriate acceptors and among the series of CT complexes being consisted of stable radicals and acceptors, relatively high conducting behaviors have been found in a series of CT complexes derived from alkylamino-TEMPO and tetracyanoazulene, although semiconducting behaviors have been apparent from the temperature dependence of their conductivities. Several pyridiuium salts with stable radical substituents have been prepared to investigate their photochemical, conducting and magnetic properties and found the interesting magnetic properties in some of the compounds prepared but further studies on their properties are now under way together with the development of other interesting systems.
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