Citation:
LU Kui, YUAN Nai-Xiang, ZHOU Zhi-Xian, WU Yang-Jie. Synthesis and Property of Tetraethoxy-carbonylmethoxy calix [4]arene[J]. Chinese Journal of Applied Chemistry,
;2002, 19(10): 958-962.
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25, 26, 27, 28-Tetraethoxycarbonylmethoxy calix [4]arene(3) was synthesized by reacting calix [4]arene(2) with ethyl bromoacetate using K2CO3 as base in acetone. The structure of (3) was characterized by elmenetal analysis, IR, UV, MS, 1H and 13C NMR spectra. Compound 3 exist in "partial cone" conformations. The coordination behavior of the compound with four rare earth metal(Ⅲ) nitrates in acetonitrile were studied by fluorescence spectrometry. The stability constants(lg Ks) of the complexes of 3 with rare earth metal(Ⅲ) nitrates and Gibbs free energy change(-ΔG0) of the coordination reactions were calculated according to the modified Hilderbrand-Benesi equation. The calix [4]arene obtained exhibited a strong coordination ability with rare earth nitrates and good transportability for alkali metal ions throungh liquid membrane in order of Na+> K+> Li+.
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