新型多齒螯合配體及其配合物的合成、表征和性能研究
發(fā)布時間:2019-06-27 10:10
【摘要】:多齒螯合配體具有較強的配位能力、較大的靈活性和特殊的空間立體效應,因此合成的配合物往往結構多樣,并且會有熒光、磁性、生物活性等多方面的優(yōu)良性能。設計合成適宜的、能選擇性配位的多齒螯合配體,通過與不同的金屬離子反應,并改變反應條件等可合成結構新穎、功能多樣的配合物。研究配合物的結構和性能之間的關系,對配位化學的研究以及新型功能材料的設計合成具有非常重要的意義。本論文設計制備了兩種不同電子特性取代基的水楊酰胺類Salen配體,合成了7個稀土金屬配合物1-7,通過元素分析、核磁共振氫譜、紅外光譜對配體進行了表征,在此基礎上借助于紫外光譜、熒光光譜、單晶x-射線衍射等對配合物進行了表征,討論了不同取代基對配合物結構的影響,進一步研究了配合物的熒光性能,討論了構-效之間的影響作用。1、簡要概述了近年來多齒螯合配體及其稀土配合物的研究進展,以及在熒光探針方面的應用。2、以N-氨乙基水楊酰胺為中心骨架,分別與5-硝基水楊醛和4-二乙胺基水楊醛合成類Salen配體H_3L~1、H_3L~2。與稀土離子反應制備了系列雙核稀土配合物[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)]。對配體及配合物的晶體結構進行了表征,并討論了不同取代基對配合物結構的影響。本部分涉及的配體如下:H_3L~1:1-(2-羥基-苯甲酰胺基)-2-(2-羥基-5-硝基-亞芐胺基)-乙烷H_3L~2:1-(2-羥基-苯甲酰胺基)-2-(2-羥基-4-二乙胺基-亞芐胺基)-乙烷3、進一步研究了系列配合物的光譜性能。研究表明配體H_3L~1、H_3L~2可以作為天線配體,有效的敏化稀土熒光。此外,Eu_2(H_2L~1)3(NO_3)_3]·3CH_3 CN(3)在乙腈溶液中可以靈敏的、高選擇性的識別Al~(3+)。并討論了配合物結構對其性能的影響。4、結果與展望:對上述兩種配體及其配合物的結構、熒光性能研究的基礎上,探討了配體結構對配合物結構和性能的影響。本論文的研究成果豐富了稀土發(fā)光配合物的研究,并對配合物的構-效關系研究有一定的指導意義。
[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,
本文編號: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,
本文編號:2506706
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