| 陈冬梅,欧敏,吴娟,黄超,朱必学.化学通报,2015,78(5):447-453. |
| Schiff碱大环的合成及其对稀土金属离子的识别研究 |
| Synthesis of Schiff Base Macrocycles and Study on Recognition for Rare-earth ions |
| 投稿时间：2014-09-17 修订日期：2014-10-24 |
| DOI： |
| 中文关键词: 席夫碱 大环 晶体结构 稀土离子 识别 |
| 英文关键词:Schiff base, macrocycle, crystal structure, rare-earth ions, recognition |
| 基金项目:国家自然科学基金项目(21061003)和教育部春晖计划项目(132008)资助 |
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| 中文摘要: |
| 利用前体二醛1 [2, 6-二(2"-甲酰基苯氧亚甲基)吡啶]分别与前体二胺2 [间苯二酚-二(4-氨基苯基)醚]和二胺3 [邻苯二酚-二(4-氨基苯基)醚]进行缩合得到Schiff 碱大环化合物L1和L2。 用前体二醛4 [间苯二酚-二(2-甲酰基苯基)醚]与二胺2进行缩合得到Schiff 碱大环化合物L3,采用1H NMR、IR、质谱和元素分析等对大环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大环L2和L3的晶体结构。 用UV-vis光谱滴定技术对大环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,大环L1对Ce3 和Eu3 离子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3.58×103 L.mol-1。 |
| 英文摘要: |
| Two Schiff base macrocyclic compounds L1 and L2 have been synthesized from the reaction of the precursor dialdehyde 1 [2,6-bis(2"-formylphenoxymethyl)pyridine] with precursor diamine 2 [resorcinol-bis(4-aminophenyl)ether] or diamine 3 [catechol-bis(4-aminophenyl)ether] respectively, and the Schiff base macrocyclic compounds L3 was synthesized from the reaction of the precursor diamine 2 with dialdehyde 4 [1,3-bis(2"-formyl-phenoxymethyl)benzene]. The composition of the macrocyclic compounds L1～L3 were characterized by 1H NMR, IR, MS and elemental analysis, respectively. The crystal structures of L2and L3 were determined by X-ray diffraction analysis. The study for the reaction of the macrocycles L1～L3 with a series of the rare earth ions were performed by UV-Vis absorption spectra technique. The results show that the macrocycle L1 display a selective recognition ability for Ce3 and Eu3 ions, and the JOB plots of the two metal complexes indicates a 1:1 ligand/metal stoichiometry. The binding constant (K) was determined using UV-vis titration method, K = 8.27×103L.mol-1 for L1-Ce3 and K = 3.58×103L.mol-1 for L1-Eu3 . |
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