| Project/Area Number |
11640525
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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 | The University of Tokyo |
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Principal Investigator |
OGAWA Keiichiro The University of Tokyo Graduate School of Arts and Sciences Associate Professor, 大学院・総合文化研究科, 助教授 (50114426)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1999: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | Thermochromism / Proton tautomerization / Salicylideneanilines / X-ray crystallographic analysis / Intermolecular hydrogen bonding / Zwitterion / Quinoid / サリチリデンアニリン / 互変異性 / 電子スペクトル |
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| Research Abstract |
Reversible change in color of substances with variation of the temperature is known as thermochromism and has attracted much interest from chemist for a long time. Salicylideneanilines belong to a class of the most popular compounds that show thermochromism in the solid state. We recently succeeded for the first time in the observation of the crystal structure change associated with the thermochromism and in the determination of the structure of the colored form. Furthermore, we discovered that salicylideneanilines are generally thermochromic in the fluid solution of a saturated hydrocarbon solvent, although it has been believed that salicylideneanilines are thermochromic only in the solid state. Our study revealed that the association of the molecules plays an essential role in the thermochromism.
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