2005 Fiscal Year Final Research Report Summary
The Study on the new chemosensors detected by the controlling a new charge transfer process.
| Project/Area Number |
16550065
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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 |
Analytical chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
MOROZUMI Tatsuya Hokkido Univ., Graduate School of Science, Assistant, 大学院・理学研究科, 助手 (50271713)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Hiroshi Hokkaido Univ., Graduate School of Science, Professor, 大学院・地球環境科学研究科, 教授 (00117194)
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| Project Period (FY) |
2004 – 2005
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| Keywords | photo induced charge transfer / twisted intrramolecular charge transfer / fluorophores / liner crownether / chemical sensors / "off-on" fluorescence response / anthracene aromatic amides / naphtylmethyl-N-phenyl amides |
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| Research Abstract |
New fluorescent ionophores containing a series of anthracene aromatic amides and naphtylmethyl-N-phenyl amides moiety based on oligo-ethylene oxide have been synthesized and its photochemical behaviors have been studied. In the absence of metal ion, these amides moiety showed a weak fluorescence emission (fluorescence "off state"). However, complexation with Ca^<2+> induced a large enhancement effect on the fluorescence intensity of 1_4 and 1_5 from the naphthalene ring (fluorescence "on" state). This behavior can be explained by in terms of the similar twisted intramolecular charge transfer relaxation mechanism. Such an "off-on" fluorescence response provided the digital detection of alkaline earth metal ions.
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