1988 Fiscal Year Final Research Report Summary
Basic study on cation complexation and transport of crown ether aggregates
| Project/Area Number |
61470088
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
有機工業化学
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| Research Institution | Kyushu University |
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Principal Investigator |
MATSUDA Tsutomu Kyushu University, Professor, 工学部, 教授 (90037672)
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| Co-Investigator(Kenkyū-buntansha) |
栗田 眞弓 九州大学, 工学部, 教務員
WADA Fumio Kyushu University, Research Assistant, 工学部, 助手 (90108671)
KIKUKAWA Kiyoshi Kyushu University, Associate Professor(unti Mar.31, 1987), 工学部, 助教授 (60037918)
KURITA Mayumi Kyushu University, Assistant (unti July 31,1988)
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| Project Period (FY) |
1986 – 1988
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| Keywords | Crown ether / Azacrown ether / Bis(crown ether) / Cation complexation / Liquid crystal / カチオン液膜輸送 |
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| Research Abstract |
1. Complexation of Bis(crown ether)s. Well-defined 'biscrown effect' was proved to occur only in bis(benzocrown ether)s. In other bis(crown ether)s containing mono-azacrown ether, the cation complexation were dependent on their conformational feature('induced fit'), or were strongly affected by 'lariat effect'. ^<13>C-NMR and X-ray structural studies of thiocyanate complexes confirmed the conclusion.
2. Synthesis and Cation Complexation of Liquid Crystals Containing Benzocrown Ether. New seven liquid crystal compounds(nematic and cholesteric) were prepared. Selective complexation in liquid crystal state was demonstrated by doping of picrates. Using a new fluorescence technique, complexation constants in liquid crystal state were determined for the first time.
3. Cation Transport Mediated with Crown Ether. Structural factors of seven new counter anion compounds were examined for extraction and transport. Study of the dynamic behavior of cation-crown ether complexesin organic phase, using multi-channel spectrophotometer, reveals the following novel findings. In sharp contrast with lipophilic crown ether, use of N-C_<18>H_<37>-monoazacrownether brought about anion exchange(phenolat with chloride), and formation of an aggregate, resulting marked increase of the transport rate. Base on further detailed studies, we proposed a new 'double cycle' mechanism in crown ether mediated cation transport for the first time.
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Research Products
(20 results)
