A new vic-dioxime functionalized calix[4]pyrrole was synthesized from anti-chloroglyoxime and 4-aminophenyl-calix[4]pyrrole at room temperature. The Ni(II) complex has been prepared by reacting the ligand with NiCl2·6H2O in ethanol. These receptors were characterized by elemental analyses, 1H and 13C NMR spectra, IR and mass spectra. Electrochemical properties of the ligand, and its Ni(II) complex were investigated in CH2Cl2 solution by cyclic voltammetry at 100 mV s−1 scan rate. Anion-binding studies were carried out using UV–Vis, and 1H NMR titrations, revealed that the Ni(II) complex exhibits selective recognition toward F− over other anions. The selectivity for F– among the halides is attributed mainly to the hydrogen-bond interaction of the receptor with F–. Receptor showed colour change from red to brown in the presence of tetrabutylammonium fluoride (TBAF) with 1:2 stoichiometry.
室温下,由反
氯乙二
肟和 4-
氨基苯基-萼[4]
吡咯合成了一种新的沧二
肟官能化萼[4]
吡咯。
配体与 NiCl2-6H2O 在
乙醇中反应制备了 Ni(II) 复合物。通过元素分析、1H 和 13C NMR 光谱、红外光谱和质谱对这些受体进行了表征。在
CH2Cl2 溶液中,以 100 mV s-1 的扫描速率通过循环伏安法研究了
配体及其 Ni(II) 复合物的电
化学特性。利用紫外可见光和 1H NMR 滴定法进行了阴离子结合研究,结果表明 Ni(II) 复合物对 F- 而不是其他阴离子具有选择性识别能力。在卤化物中对 F- 的选择性主要归因于受体与 F- 的氢键相互作用。在
四丁基氟化铵(TBAF)以 1:2 的比例存在时,受体的颜色从红色变为棕色。