稀土芳香羧酸配位聚合物微纳米结构的合成、表征及其性能研究
发布时间：2018-10-09 11:33
【摘要】：配位聚合物在荧光、气体储存、吸附、催化、传感和磁性等领域有着广泛的应用,是当前化学和材料化学领域的研究热点之一。与过渡金属配位聚合物相比,稀土金属配位聚合物具有多种多样的拓扑结构和特殊的光电磁、催化等性质,使其越来越受到国内外相关领域学者的青睐。但是合成过程中,由于受到温度、时间、桥连配体等因素的影响,可控合成金属配位聚合物仍然是一种挑战。本文利用微波法、溶剂热法合成了几种稀土配合物微/纳米结构,并对其结构和性能进行了研究,对其应用进行了探索。本项工作为合成其它配位聚合物提供了一定的方法路线和理论依据。本论文的主要研究内容有:(1)稻草束状铽配位聚合物的微波辅助合成及作为荧光探针检测重金属离子在微波辅助条件下,以均苯四甲酸(H4BTC)作为有机配体,快速合成了稻草束状的配位聚合物。此方法快速,温和且环保。提出了稻草束状结构配合物的可能形成机理,并讨论了铽基配位聚合物的荧光性能以及其检测重金属离子的能力,尤其是对Pb2+金属离子的检测能力。(2)钆及其它稀土配位聚合物空心球的溶剂热合成与表征在无表面活性剂和模板的条件下,将2-氨基对苯二甲酸(H2ATPA)作为有机配体,使用溶剂热法合成出新颖的具有空心结构的配合物。氨基是一个给电子基团,而金属离子通常是接受电子的。因此,在配合物中的氨基可以用作一个结合位点来结合金属离子。本章研究了一系列反应条件对产物结构和形貌的影响,另外用类似的方法制备了其它稀土元素配位聚合物,讨论了空心球状结构的形成机理和荧光性能。(3)钆及其它稀土配位聚合物球的合成与表征混合溶剂作为一种反应介质,在合成具有各种形貌的无机材料中己经被广泛应用。由于溶剂的不同,其对产物的形貌和物相方面都有着巨大的影响。本实验利用2-氨基对苯二甲酸(H2ATPA)作为有机配体,通过改变反应溶剂的组成,从而合成了实心球状的配位聚合物,另外用类似的方法制备其它稀土元素配位聚合物,讨论了配合物荧光性能。
[Abstract]:Coordination polymers have been widely used in the fields of fluorescence, gas storage, adsorption, catalysis, sensing and magnetism. Compared with transition metal coordination polymers, rare earth coordination polymers have a variety of topologies, special optoelectronic magnetic and catalytic properties, which make them more and more popular in related fields at home and abroad. However, due to the influence of temperature, time and bridging ligands, the controllable synthesis of metal coordination polymers is still a challenge. In this paper, some rare earth complexes have been synthesized by microwave method and solvothermal method. The structure and properties of rare earth complexes have been studied and their applications have been explored. This work provides a certain method and theoretical basis for the synthesis of other coordination polymers. The main contents of this thesis are as follows: (1) Microwave-assisted synthesis of terbium coordination polymer from rice straw and detection of heavy metal ions with H4BTC as organic ligand under microwave-assisted conditions. The coordination polymers with straw bundles were synthesized rapidly. This method is fast, mild and environmentally friendly. The possible formation mechanism of the complexes with straw bundles was proposed. The fluorescence properties of terbium based coordination polymers and their ability to detect heavy metal ions were discussed. (2) Solvothermal synthesis and characterization of gadolinium and other rare earth coordination polymer hollow spheres. 2-aminoterephthalic acid (H2ATPA) was used as an organic ligand in the presence of no surfactant and template. A novel complex with hollow structure was synthesized by solvothermal method. An amino group is an electron-giving group, whereas metal ions usually receive electrons. Therefore, the amino group in the complex can be used as a binding site to bind metal ions. In this chapter, the effects of a series of reaction conditions on the structure and morphology of the product were studied. In addition, other rare earth element coordination polymers were prepared by a similar method. The formation mechanism and fluorescence properties of hollow spherical structure were discussed. (3) the synthesis and characterization of gadolinium and other rare earth coordination polymer spheres as a reaction medium have been widely used in the synthesis of inorganic materials with various morphologies. Because of the different solvents, it has a great influence on the morphology and phase of the product. In this study, solid spherical coordination polymers were synthesized by using 2-aminoterephthalic acid (H2ATPA) as organic ligands, and other rare earth coordination polymers were prepared by changing the composition of the reaction solvent. The fluorescence properties of the complexes were discussed.
【学位授予单位】：江西师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O634.3;TB383.1
本文编号：2259190
[Abstract]:Coordination polymers have been widely used in the fields of fluorescence, gas storage, adsorption, catalysis, sensing and magnetism. Compared with transition metal coordination polymers, rare earth coordination polymers have a variety of topologies, special optoelectronic magnetic and catalytic properties, which make them more and more popular in related fields at home and abroad. However, due to the influence of temperature, time and bridging ligands, the controllable synthesis of metal coordination polymers is still a challenge. In this paper, some rare earth complexes have been synthesized by microwave method and solvothermal method. The structure and properties of rare earth complexes have been studied and their applications have been explored. This work provides a certain method and theoretical basis for the synthesis of other coordination polymers. The main contents of this thesis are as follows: (1) Microwave-assisted synthesis of terbium coordination polymer from rice straw and detection of heavy metal ions with H4BTC as organic ligand under microwave-assisted conditions. The coordination polymers with straw bundles were synthesized rapidly. This method is fast, mild and environmentally friendly. The possible formation mechanism of the complexes with straw bundles was proposed. The fluorescence properties of terbium based coordination polymers and their ability to detect heavy metal ions were discussed. (2) Solvothermal synthesis and characterization of gadolinium and other rare earth coordination polymer hollow spheres. 2-aminoterephthalic acid (H2ATPA) was used as an organic ligand in the presence of no surfactant and template. A novel complex with hollow structure was synthesized by solvothermal method. An amino group is an electron-giving group, whereas metal ions usually receive electrons. Therefore, the amino group in the complex can be used as a binding site to bind metal ions. In this chapter, the effects of a series of reaction conditions on the structure and morphology of the product were studied. In addition, other rare earth element coordination polymers were prepared by a similar method. The formation mechanism and fluorescence properties of hollow spherical structure were discussed. (3) the synthesis and characterization of gadolinium and other rare earth coordination polymer spheres as a reaction medium have been widely used in the synthesis of inorganic materials with various morphologies. Because of the different solvents, it has a great influence on the morphology and phase of the product. In this study, solid spherical coordination polymers were synthesized by using 2-aminoterephthalic acid (H2ATPA) as organic ligands, and other rare earth coordination polymers were prepared by changing the composition of the reaction solvent. The fluorescence properties of the complexes were discussed.
【学位授予单位】：江西师范大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：O634.3;TB383.1
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