Calix[4]crown-6-2,4-bis(4-aminobutyl ether), which has a crown-6 moiety at the 1,3-position and amino function at the 2,4-position, was prepared as an intermediate for the subsequent synthesis of calix[4]crown-6-containing polyamide and polyimide using adipoyl chloride and 1,2,4,5-benzenetetracarbox...
Calix[4]crown-6-2,4-bis(4-aminobutyl ether), which has a crown-6 moiety at the 1,3-position and amino function at the 2,4-position, was prepared as an intermediate for the subsequent synthesis of calix[4]crown-6-containing polyamide and polyimide using adipoyl chloride and 1,2,4,5-benzenetetracarboxylic dianhydride. The chemical structures were characterized by IR, $^{1}H NMR$ spectroscopy and elemental analysis, and some of their physical properties, including their thermal behavior, were examined. The ion binding characteristics of the monomer and polymers for alkali metal and alkali earth metal ions were measured by liquid-liquid extraction from the aqueous phase into the organic phase. It has been observed that polyamide has a high binding ability towards various metal cations as compared to polyimide, which showed cesium ion selectivity.
Calix[4]crown-6-2,4-bis(4-aminobutyl ether), which has a crown-6 moiety at the 1,3-position and amino function at the 2,4-position, was prepared as an intermediate for the subsequent synthesis of calix[4]crown-6-containing polyamide and polyimide using adipoyl chloride and 1,2,4,5-benzenetetracarboxylic dianhydride. The chemical structures were characterized by IR, $^{1}H NMR$ spectroscopy and elemental analysis, and some of their physical properties, including their thermal behavior, were examined. The ion binding characteristics of the monomer and polymers for alkali metal and alkali earth metal ions were measured by liquid-liquid extraction from the aqueous phase into the organic phase. It has been observed that polyamide has a high binding ability towards various metal cations as compared to polyimide, which showed cesium ion selectivity.
FT-IR spectra were obtained with a Biorad Excaliber FTS-3000MX spectrophotometer and NMR spectra were recorded on a Varian Unity Inova (200 MHz) spectrometer. Elemental analyses were performed using a Yanaco MT-3 CHN instrument. UV/Vis spectra were obtained on a Shimadzu 1601PC.
성능/효과
In conclusion, polyamide and polyimide containing crown-6 moiety were newly prepared by reacting calix[4] crown-6-2, 4-bis(4-aminobutyl ether) (4) with adipoyl chloride and 1, 2, 4, 5 -benzenetetracarboxylic dianhydride. It has been observed that the polyamide 5 and polyimide 6, which have ion-binding ability of calix[4]crown in the polymer backbone towards various metal cations, showed cesium ion selectivity.
참고문헌 (27)
A. Castini, R. UngaiO, Z. Asfari, J. Vicens, in Calixarenes 2001, Z, Asfari, V. Bohmer, J. Harrowfield, and J. Vicens, Eds., Kluwer Academic, Dordrecht, 2001
L. Nicod, S. Pellet-Rostaing, F. Chitry, and M. Lemaire, Tetrahedron, 39, 9443 (1998)
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