【摘 要】
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A few derivatives of calixarenes have been synthesized and characterized by IR, 1H NMR, thermal and elemental analysis. The transport of potassium or calcium io
【机 构】
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College of Chemistry and Chemical Engineering,The Fourteenth High School of Huainan
论文部分内容阅读
A few derivatives of calixarenes have been synthesized and characterized by IR, 1H NMR, thermal and elemental analysis. The transport of potassium or calcium ion through the liquid membrane, in which the derivatives act as carriers, has been studied. The electron-effect of the substituent on the upper rim of calixarene possesses important effect on the net transport of metal ions. The ptert-butylcalix[4]arene is the best carrier of calcium ion,compared with p-tert-calix[4]arene(n = 4, 6, 8). The ptert-butylcalix[4]arene acid is better than p-tert-butylcalix [4]arene. The calix[4]crown is the best carrier of calcium ions of all the carriers. The pH gradient between the source and receiving phase, and the concentration of K+, Ca2+ions in the source phase affect mainly transport. After the transport, the pH value of the source phase is found to be decreased, once the calix [n] arene derivatives act as carrier. But it is not the case for the calix[n] crowns. It might be interpreted as the result of their different mechanisms.
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