| Project/Area Number |
17510087
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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 |
Nanostructural science
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| Research Institution | Kyushu University |
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Principal Investigator |
GOTO Kenta Kyushu University, INSTITUTE FOR MATERIALS CHEMISTRY AND ENGINEERING, ASSISTANT PROFESSOR (30380538)
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| Co-Investigator(Kenkyū-buntansha) |
SHINMYOZU Teruo KYUSHU UNIVERSITY, INSTITUTE FOR MATERIALS CHEMISTRY AND ENGINEERING, PROFESSOR (90037292)
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| Project Period (FY) |
2005 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2006: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2005: ¥2,900,000 (Direct Cost: ¥2,900,000)
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| Keywords | MEROCYANINE / HYDROGEN BOND / EXCITON INTERACTION / CLUSTER / 自己組織化 / プロトン移動 |
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| Research Abstract |
The absorption and fluorescence spectral properties of 4-amino-6-oxopyrimidine 1, which has a simple streptopolymethine merocyanine skeleton, clearly showed that the molecule 1 formed the aggregate In, and showed an exciton band, appearing at an absorption of 350 nm due to the red-shifted HOMO-LUMO transition. Upon light irradiation of the exciton band, a fluorescence band at 398 nm (ΦFL = 0.10) was observed, and its decay life-times were determined. Based on these spectral features, the aggregated In was found to be formed by J-type aggregation. The molecular orientation 1 in the crystal was revealed as being both parallel π-π stacking and hydrogen bonding chains [1]. Since the molecule orientation the parent molecule is closely related to an excitonic interaction, we therefore focused on molecular assembly of its derivatives. Crystals of 4-methylamino-6-oxopyrimidine 2 grown from aqueous alcohol were found to contain 2D water layers consisting of hexameric water clusters with alternating quasi-planar and chair conformations, which are apparently regulated by interactions with the supramolecular aggregate of 2n through hydrogen bonds [2].
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