| Project/Area Number |
07454201
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
分離・精製・検出法
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| Research Institution | KYOTO UNIVERSITY |
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Principal Investigator |
MATSUI Masakazu The Institute for Chemical Research Professor, 化学研究所, 教授 (90027037)
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| Co-Investigator(Kenkyū-buntansha) |
SOHRIN Yoshiki The Institute for Chemical Research Instructor, 化学研究所, 助手 (50197000)
UMETANI Shigeo The Institute for Chemical Research Associate Professor, 化学研究所, 助教授 (80160315)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1996)
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| Budget Amount *help |
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1996: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1995: ¥5,500,000 (Direct Cost: ¥5,500,000)
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| Keywords | molecular recognition / selective complex formation / bite size / beta-diketones / polypyrazolyl borate / solvent extraction / separation chemistry / イオンサイズ認識 / 配位子間の歪み / 配位子内の歪み / 分離機能 / 配位子設計 |
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| Research Abstract |
Ion size recognition with conventional organic ligands was proved to be governed by several factors. The first is based on the distance between the donor atoms, that is, the bite size. Bite size in a 6-membered ring such as beta-diketone also governs not only the selectivity, but the acidity of the ligand. The second factor governing ion size recognition is the chelate ring rigidity. The third is the unstabilization of chelates based on the inter ligand contact, which is caused by bulky terminal group of the ligand.
The application of the three requirments to the separation of rare earth and Group 13 metal ions was performed : The efficient extraction-separation of each metal ion in Group 13 by bulky 4-substituted acylpyrazolones confirms the validity of the factors on the role of the bite size and steric factors. The above results thus have proved the possibility of designing ligands of high selectivity for target metal ions by controlling the bite size of the ligand and/or creating intra- and interligand contacts.
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