| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
Various types of trialkyl-monoacetic acid derivatives of calix[4]arene were prepared to investigate extraction property as extraction reagents, adsorption property as ion-exchange resins, and potential response property as ion-selective electrodes. Although lipophilic - hydrophilic repulsion was expected for lithium selectivity using trialkyl-monoacetic acid derivatives of calix[4]arene, result for 1H-NMR spectra showed that affinity for hydrogen bond between water molecules remaining in lithium ion and phenoxy oxygen atoms of calixarenes is related to selectivity. The extraction reagent-impregnated resin still exhibited lithium selectivity due to effect of hydrogen bond, while methylene crosslinked resin did not show lithium selectivity due to less hydrogen bond. The lithium selectivity was also observed using trialkyl-monoacetoamide derivatives of calix[4]arene, which is also attributed to hydrogen bond.
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