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利用2,6-二(2’-甲酰基苯氧亚甲基)吡啶(1)分别与间苯二酚-二(4-氨基苯基)醚(2)和邻苯二酚-二(4-氨基苯基)醚(3)进行缩合得到席夫碱大环化合物L1和L2。用间苯二酚-二(2-甲酰基苯基)醚(4)与2缩合得到席夫碱大环化合物L3。采用1H NMR、IR、质谱和元素分析等对L1、L2和L3的组成进行表征,采用X射线单晶衍射技术测定了L2和L3的晶体结构。用UV-Vis光谱滴定技术对L1、L2和L3与系列稀土离子的键合作用分别进行了考察,结果表明,L1对Ce3+和Eu3+具有选择性识别作用,配位作用的键合比均为1∶1,键合常数依次分别为8.27×103和3.58×103L/mol。
(2) and catechol-bis (4-aminophenyl) ether (2) were synthesized using 2,6-bis (2’-formylphenoxymethylene) -aminophenyl) ether (3) to give Schiff base macrocycles L1 and L2. Schiff base macrocycle L3 was obtained by condensation of resorcinol-bis (2-formylphenyl) ether (4) with 2. The compositions of L1, L2 and L3 were characterized by 1H NMR, IR, MS and elemental analysis. The crystal structures of L2 and L3 were determined by single crystal X-ray diffraction. The bonding of L1, L2 and L3 with rare earth ions were investigated by UV-Vis spectrophotometry. The results showed that L1 has selective recognition of Ce3 + and Eu3 +, and the bonding ratio of coordination was 1 : 1, the bonding constants were 8.27 × 103 and 3.58 × 103L / mol, respectively.