| Project/Area Number |
04640541
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
分析・地球化学
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| Research Institution | Chiba University |
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Principal Investigator |
KUDO Yoshihiro Chiba University, Chemistry, Research assistant, 理学部, 助手 (00195463)
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| Co-Investigator(Kenkyū-buntansha) |
FUKADA Naoaki Chiba University, Chemistry, Assistant professor, 理学部, 助教授 (50009601)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1993: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Macrocyclic compounds / Liquid / liquid interface / Ion transfer / Electrochemical method / 液-液界面イオン移動 |
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| Research Abstract |
1. In order to estimate the ion selectivity of functional macrocyclic compounds (L), we examined by the ion-transfer polarography the facilitated transfer of several alkali metal ions at a nitrobenzene/water (NB/w) interface in the presence of bis(12-crown-4) and 12-crown-4 which were commercially available. The results were compared with those reported for acyclic ionophores. Selectivity coefficients, proposed in the present study, of L and the acyclic ionophores were in accord with the coefficients determined potentiometrically for the ion-selective electrodes containing an NB derivative as a membrane solvent. From above results, it was shown that the proposed coefficients were effective in estimating the ion selectivity of L with respect to a monovalent metal ion.
2. The monovalent-metal ion selectivity of L against divalent metal ions were determined ion-transfer-polarographically (L=dibenzo-18-crown-6 (DB18C6), benzo-18C6 and dibenzo-24-crown-8). In the metal-ion concentration range of 10^<-1>10^<-2> mol/dm^3, no concentration dependence of the selectivity coefficients was observed.
3. The facilitated ion transfer at a chloroform (CF)/w interface was examined. Analyzing the ion transfer and extraction behavior at the CF/w interface, the association of K(DB18C6)^+ with a counter anion such as picrate must be considered in addition to the equilibrium process in the NB/w system.
4. New macrocyclic compounds containing both the donor sulfur and oxygen atoms were synthesized. The ion selectivity of these macrocycles is now under examination.
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