中文关键词:席夫碱大环晶体结构四面体阴离子识别 英文关键词:Schiff base macrocycleCrystal structuresTetrahedral anionRecognition 基金项目:国家自然科学基金项目（21663008）和教育部春晖计划项目（教外司留[2019]1383）资助

作者	单位	E-mail
易贤美	贵州大学大环及超分子化学重点实验室 贵阳 550025
邓雅欣	贵州大学大环及超分子化学重点实验室 贵阳 550025
黄超	贵州大学大环及超分子化学重点实验室 贵阳 550025
朱必学	贵州大学大环及超分子化学重点实验室 贵阳 550025	bxzhu@gzu.edu.cn

摘要点击次数:745 全文下载次数:0 中文摘要: 采用前体二胺N，N'-（3-氨基苯基）-2，6-二甲酰亚胺吡啶（1）和5，5'-亚甲基双水杨醛（2）进行缩合反应得到含酚羟基的[1+1]席夫碱大环L¹，将其中席夫碱C＝N双键还原得到环状骨架更具柔性的饱和大环L²。通过¹H NMR、FABMS和元素分析等对大环组成进行了表征，并通过X射线单晶衍射解析了两个大环分子的晶体结构。采用UV-Vis光谱滴定技术对大环与系列阴离子的络合作用进行了考察，结果表明，席夫碱大环L¹对四面体构型的阴离子H₂PO₄^-、HP₂O₇^3-和H₂P₂O₇^2-有明显的选择性识别作用，进一步通过UV-Vis光谱、核磁滴定等技术获得了识别反应的配位比及平衡常数（K），L¹对3个磷酸阴离子的络合能力依H₂PO₄^-、HP₂O₇^3-和H₂P₂O₇^2-顺序递增。 英文摘要: [1+1] Schiff base macrocycle L¹ was synthesized from the reaction of precursors N,N'-bis(3-aminophenyl)-pyridine-2,6-dicarboxamide (1) with 5,5'-methylene-bis-salicylaldehyde (2), and furthermore the macrocycle L¹ was reduced to the corresponding saturated macrocycle L². The two macrocycles were characterized by ¹H NMR, FABMS spectroscopies and elemental analysis, and their crystal structures were determined by X-ray diffraction analysis. The two macrocycles exhibited non-planar structures, and L² showed a more flexible twisted conformation. The complexation of macrocycles with a series of anions was investigated by UV-Vis spectrometric titration technology. The results showed that L¹ had obvious selective recognition ability for tetrahedral anions H₂PO₄^-, HP₂O₇^3-, and H₂P₂O₇^2-, respectively. Properties of the [1+1] Schiff base macrocycle L¹ hydrogen-bonding interactions with these tetrahedral anions were investigated using UV-Vis and ¹H NMR titration, respectively. The stoichiometric ratio and binding constant (K) of the interaction were obtained. The results demonstrated that L¹ binded the three anions with a 1:1 binding stoichiometry, and the bonding constants (K_a) increased in the order of H₂PO₄^-, HP₂O₇^3-, H₂P₂O₇^2-. 查看全文查看/发表评论下载PDF阅读器 相关附件：支撑材料L1晶体文件L2晶体文件版权转让声明书支撑材料 -->