| Project/Area Number |
06650983
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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 |
有機工業化学
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| Research Institution | Osaka University |
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Principal Investigator |
NAKATSUJI Yohji Osaka University, Engineering, Associate Professor, 工学部, 助教授 (00127268)
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| Co-Investigator(Kenkyū-buntansha) |
KIDA Toshiyuki Osaka University, Engineering, Assistant Professor, 工学部, 助手 (20234297)
MASUYAMA Araki Osaka University, Engineering, Associate Professor, 工学部, 助教授 (30157218)
IKEDA Isao Osaka University, Engineering, Professor, 工学部, 教授 (70029049)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1994: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | synthetic ionophore / membrane transport / molecular recognition / alkali metal ion / alkaline earth metal ion |
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| Research Abstract |
In this study, we prepared a variety of new macrocyclic and open-chain compounds with good complexation properties toward alkali metal and alkaline earth metal cations. One of the remarkable characteristics of these compounds is that they respond to a kind of stimulus such as pH.The results are summarized as followes.
1.Five synthetic ionophores containing two carboxylic acid groups were synthesized as the carriers for alkaline earth metal cations. Among them, the lipophilic derivative having a trimethylene bridge and plural quinaldate moieties selectively transported barium ion from the basic aqueous phase to the acidic aqueous through the bulk dichloromethane liquid membrane.
2.Two types of noncyclic proton-ionizable ionophores such as lipophilic quinaldic acid and nitrophenol derivatives selectively transported lithium ion from the basic source phase to the acidic receiving phase through the emulsion liquid membrane (ELM) and the results were compared with those obtained in the bulk l
… More
iquid membrane (BLM) system. The transport velocity was extremely increased in comparison with that of the latter system, though the lithium ion selectivity was moderate.
3.A series of C-pivot tripodal ligands containing a 2-methylglycelol unit were prepared and their complexation properties towards alkali metal cations were examined by the solvent extraction method and UV spectroscopy. These types of compounds possessed a higher extractability than the other type of tripodal ligand derived from trimethylolethane. This finding clearly shows that the proper selection of the basic skeleton structure is important for the molecular design of C-pivot tripodal ligands.
4.New types of monoazacryptands were prepared and their complexation properties toward alkali metal cations were examined by the solvent extraction method, UV spectroscopy, X-ray crystal analysis, and liquid membrane transport. A lipophilic macrobicyclic polyether consisting of two 18-crown-6-rings and one 20-crown-6-ring was found to be a highly selective potassium ion carrier through a bulk liquid membrane by pH control. Less
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