An Efficient Ag+ Ionophore Based on Thiacalix[4]arene
作者： Xiong LI , Shu-Ling GONG , Wei-Ping YANG , Yuan-Yin CHEN
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摘要: A novel Ag+ ionophore, p-tert-butyl-tetrakis(hydrazinocarbonylmethoxy)thiacalix[4]arene in 1,3-alternate conformation (thiacalix[4]arene tetrahydrazide, 1) was synthesized. Its binding properties towards alkali and transition metal cations were studied by noncompetitive liquid-liquid extraction of (Li+, Na+, K+ Cs+) (Co2+, Ni2+, Cu2+, Zn2+, Ag+) picrates. It found that the thiacalix[4]arene tetrahydrazide exhibited high extractability Ag+, lower percent little or no ability others. The selectivity further evaluated competitive experiments mixture above-mentioned nine cations, concentration which monitored with ICP-OES. 1H NMR titration ESI-MS proved stoichiometry 1 to 1:1, ′N-Ag+′ interaction assistance thiacalixarene skeleton primarily involved complexation.
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