中文摘要：

在硫酸催化作用下,采用前体二醛1,7-二（2＇-甲酰苯基）-4-氮-1,7-二氧-4-（4＇-对甲苯磺酸基）庚烷（1）和1,7-二（2＇-甲酰苯基）-1,4,7三氧庚烷（2）与二胺化合物N,N＇-（2-胺基苯基）-2,6-二甲酰亚胺吡啶（3）分别进行缩合,得到[1＋1]Schiff碱大环化合物4和5,并用元素分析、1H NMR、IR和质谱等对大环化合物4和5进行表征.同时用X射线衍射方法测定了2个前体和2个Schiff碱大环的晶体结构.单晶X射线衍射结果表明,2个大环化合物分子中,分子内氢键作用导致整个分子呈现为一扭曲＂8＂字形构型,分子内一对苯环之间的π-π相互作用进一步稳定其分子的扭曲结构.其紫外研究结果显示,大环化合物4和5对镧（III）离子具有选择性识别作用.

英文摘要：

Two novel [1＋1] Schiff base macrocyclic compounds 4 and 5 have been synthesized from Precursor 1 [1,7-bis（2＇-formylphenyl）-4-aza-l,7-dioxa-4-（4＇-toluenesulfonyl）heptane] and Precursor 2 [1,7-bis（2＇-formylphenyl）-l,4,7- trioxaheptane] with diamine 3 [N,N＇-（2-aminophenyl）pyridine-2,6-dicarboxamide] via condensation and cyclizaction in acid-catalyzed condition, respectively, and the structures were characterized by elemental analysis, IH NMR, IR and MS tech- niques. Simultaneously, the crystal structures of two compounds 4 and 5 were determined by X-ray diffraction analysis. The X-ray single crystal analysis reveals that each of the two macrocycles 4 and 5 exhibits twisted ＂figure eight＂ conformation due to the strong intramolecular hydrogen bonding interactions, and the stabilized structure in part by the intramolecular rt-n stacking interactions between the two benzene rings. The studies on the UV-vis absorption spectra show that the two macrocy- cles 4 and 5 have a selective recognition for La3＋ ion.