新型多齿螯合配体及其配合物的合成、表征和性能研究
发布时间：2019-06-27 10:10
【摘要】：多齿螯合配体具有较强的配位能力、较大的灵活性和特殊的空间立体效应,因此合成的配合物往往结构多样,并且会有荧光、磁性、生物活性等多方面的优良性能。设计合成适宜的、能选择性配位的多齿螯合配体,通过与不同的金属离子反应,并改变反应条件等可合成结构新颖、功能多样的配合物。研究配合物的结构和性能之间的关系,对配位化学的研究以及新型功能材料的设计合成具有非常重要的意义。本论文设计制备了两种不同电子特性取代基的水杨酰胺类Salen配体,合成了7个稀土金属配合物1-7,通过元素分析、核磁共振氢谱、红外光谱对配体进行了表征,在此基础上借助于紫外光谱、荧光光谱、单晶x-射线衍射等对配合物进行了表征,讨论了不同取代基对配合物结构的影响,进一步研究了配合物的荧光性能,讨论了构-效之间的影响作用。1、简要概述了近年来多齿螯合配体及其稀土配合物的研究进展,以及在荧光探针方面的应用。2、以N-氨乙基水杨酰胺为中心骨架,分别与5-硝基水杨醛和4-二乙胺基水杨醛合成类Salen配体H_3L~1、H_3L~2。与稀土离子反应制备了系列双核稀土配合物[Ln_2(H_2L~1)3-(NO_3)_3]·3CH_3CN[Ln=Nd(1),Sm(2),Eu(3)],[Ln_2(H_2L~2)_2(NO_3)_4]·2CH_3CN[Ln=Eu(4),Er(5),Tm(6),Yb(7)]。对配体及配合物的晶体结构进行了表征,并讨论了不同取代基对配合物结构的影响。本部分涉及的配体如下:H_3L~1:1-(2-羟基-苯甲酰胺基)-2-(2-羟基-5-硝基-亚苄胺基)-乙烷H_3L~2:1-(2-羟基-苯甲酰胺基)-2-(2-羟基-4-二乙胺基-亚苄胺基)-乙烷3、进一步研究了系列配合物的光谱性能。研究表明配体H_3L~1、H_3L~2可以作为天线配体,有效的敏化稀土荧光。此外,Eu_2(H_2L~1)3(NO_3)_3]·3CH_3 CN(3)在乙腈溶液中可以灵敏的、高选择性的识别Al~(3+)。并讨论了配合物结构对其性能的影响。4、结果与展望:对上述两种配体及其配合物的结构、荧光性能研究的基础上,探讨了配体结构对配合物结构和性能的影响。本论文的研究成果丰富了稀土发光配合物的研究,并对配合物的构-效关系研究有一定的指导意义。
[Abstract]:Multi-dentate chelating ligands have strong coordination ability, greater flexibility and special spatial stereoscopic effect, so the synthesized complexes often have various structures, and will have excellent properties such as fluorescence, magnetism, biological activity and so on. Suitable multi-toothed chelating ligands with selective coordination can be designed and synthesized. Complexes with novel structure and various functions can be synthesized by reaction with different metal ions and changing reaction conditions. It is of great significance to study the relationship between the structure and properties of complexes for the study of coordination chemistry and the design and synthesis of new functional materials. In this thesis, two kinds of salicylamide Salen ligands with different electronic properties were designed and prepared, and seven rare earth metal complexes 1 鈮，
本文编号：2506706
[Abstract]:Multi-dentate chelating ligands have strong coordination ability, greater flexibility and special spatial stereoscopic effect, so the synthesized complexes often have various structures, and will have excellent properties such as fluorescence, magnetism, biological activity and so on. Suitable multi-toothed chelating ligands with selective coordination can be designed and synthesized. Complexes with novel structure and various functions can be synthesized by reaction with different metal ions and changing reaction conditions. It is of great significance to study the relationship between the structure and properties of complexes for the study of coordination chemistry and the design and synthesis of new functional materials. In this thesis, two kinds of salicylamide Salen ligands with different electronic properties were designed and prepared, and seven rare earth metal complexes 1 鈮，
本文编号：2506706
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