【作者】 陈星光； 郭祥峰； 贾丽华；

【Author】 Xingguang Chen;Xiangfeng Guo;Lihua Jia;The Key Laboratory of Fine Chemicals of College of Heilongjiang Province, College of Chemistry and Chemical Engineering, Qiqihar University;

【机构】 黑龙江省高校精细化工重点实验室齐齐哈尔大学化学与化学工程学院；

【摘要】 伯胺的酰胺衍生物中既存在氢键给体(>N–H)又存在氢键受体(>C=O)基团。因此,它们与客体分子能够通过氢键形成超分子复合物。本文以乙二胺四乙酸和正十二烷基胺为原料,经过酰胺化反应合成了相应的乙二胺四乙酰胺两亲化合物(EDTA-a),并通过重结晶提纯了目标化合物。利用FT-IR、1H NMR、13C NMR和ESI-MS等方法表征了分子结构。自制了一个如图1(A)所示的相转移装置。该装置用氯仿将两个水相隔离,将EDTA-a溶入氯仿(0.50mmol/L);各种盐分别溶入一个水相(0.10 mol/L);然后测定另外一个纯水相的电导率数值随时间的变化,表征EDTA-a对盐的结合及迁移作用。在298.2 K测试了1 h之内另一个纯水相的电导率数值随时间变化的曲线,如图1(B)所示。实验结果表明,EDTA-a迁移邻苯二甲酸氢钾(KHP)的速率远高于其他盐,且1 h后其超纯水体系的电导率数值最大。表明了EDTA-a能够有选择性地与KHP结合,并将其从盐溶液体系迁移到纯水体系中(如图1(C)所示)。更多还原

【Abstract】 The amide derivative of the primary amine has both a hydrogen bond donor(>N-H) and a hydrogen bond acceptor(>C=O) group. Therefore, they are capable of forming supramolecular complexes with guest molecules through hydrogen bonding. In this paper, ethylenediaminetetraacetic acid(EDTA) and n-dodecylamine were used as raw materials to synthesize the corresponding ethylenediaminetetraacetamide amphiphilic compound by amidation reaction, and the target compound was purified by recrystallization. The structure of the product(EDTA-a) was characterized by FT-IR, 1 H NMR, 13 C NMR, and ESI-MS. As shown in Fig. 1(A), a phase transfer device was self-made, in which two aqueous phases was isolated by chloroform. EDTA-a was dissolved in chloroform(the concentration of the solution is 0.50 mmol/L), and various salts were dissolved in an aqueous phase(the concentration of the solution is 0.10 mol/L). Then, the conductivity changes of another pure aqueous phase was determined to characterize the binding and migration of EDTA-a to various salt. At 298.2 K, the curve of the conductivity value of another pure aqueous phase over time within 1 h is shown in Fig. 1(B). The results show that the rate of migration of potassium hydrogen phthalate(KHP) by EDTA-a is much higher than that of other salts, and the conductivity of ultrapure water system is the largest after 1 h. This demonstrates that EDTA-a can selectively bind to KHP ions and migrate them from the salt solution to the pure water, as shown in Fig. 1(C).更多还原