【作者】 刘湘枝； 梁恩湘； 易健民；

【Author】 Xiangzhi Liu;Enxiang Liang;Jianmin Yi;Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology;

【机构】 湖南理工学院化学化工学院；

【摘要】 杯芳烃是一类由苯酚单元通过亚甲基桥连所生成的大环化合物,它具有空腔可调节、构象可变、易于修饰等优点,可以借助氢键、静电作用、分子作用力、堆积作用等非共价键作用来识别客体分子,被誉为"第三代超分子"。这类大环化合物所具有的独特的空腔结构,对某些金属离子、有机阴阳离子、中性分子等都具有高度的选择性和亲和性,在分子识别、化学传感器等领域有重要的应用。针对目前稀土分离过程中存在的选择性差、分离效率低、污染严重等问题,我们合成了一系列对轻稀土离子具有选择性识别的杯[8]芳烃磷氧衍生物,期望通过P原子的引入,基于各种作用力的协同作用,提高分离选择性和萃取率。研究表明,与杯[8]芳烃母体相比,杯[8]芳烃磷氧衍生物对轻稀土离子的萃取率达98%以上,这一种利用杯[8]芳烃磷氧衍生物萃取分离纯化轻稀土的方法,将对我国稀土产业的发展有极其重要的意义。更多还原

【Abstract】 The calix[n]arene are cyclic condensation products of a parasubstituted phenol and formaldehyde. Th ese macrocycles provide versatile material for the supramolecular chemist owing to the unique cavity structure, binding properties and the almost unlimited means of derivatization. For poor selectivity, l ow separation efficiency, environmental pollution and other issues of light rare earths separation, we have synthesized a series of selective recognition of calix[8]arene phosphinoxide derivatives to impr ove the separation selectivity and the extraction rate. The results show that the extraction effect of lig ht rare earths by the calix [8] arene phosphinoxide derivatives is higher than the extraction efficiencie s of its by calix[8]arene. Compared with calix[8]arenes, the calix[8]arene phosphnoxide derivatives’ e xtraction efficiencies is up to 98% under the same condition. This article develops an isolated and pu rified method which is extraction of light rare earths, will be extremely important to the developmen t of China’s rare earth industry.更多还原