含氮杂环羧酸配体构筑的MOFS的设计、合成及性质研究
发布时间：2018-08-05 14:30
【摘要】：由于金属有机框架配合物迷人的拓扑结构和它们在气体吸附、分离、荧光、磁性、催化、电学和离子交换等领域的巨大潜在应用价值,近些年人们在设计和构筑金属有机框架配合物方面做了大量的研究工作。众所周知,有机配体和金属中心的选择在配合物的组装中至关重要,同时含有N原子和O原子的有机配体配位能力较强,因此经常被选择用来合成配合物。而对于中心金属离子,镧系离子用的最多,因为它们有着更高的配位数和更灵活的配位几何结构,此外,由于镧系金属具有较窄带宽的f-f跃迁,使得合成的基于镧系的配合物具有出色的光学性质。本文选用2,3,5-吡啶三酸作为有机配体,在水热条件下合成了 7个新型的三维 Ln-Cu MOFs[LnCu2(pdc)2(H20)2]n(Ln=Sm,1-Sm;Eu,2-Eu;Gd,3-Gd;Tb,4-Tb;Dy,5-Dy;Ho,6-Ho;Er,7-Er;H2pdc=(3,5-吡啶二羧酸)),并且利用红外光谱、X-射线单晶衍射和热重分析对部分配合物进行了表征。X-射线单晶衍射表明2-Eu、3-Gd、4-Tb、5-Dy、6-Ho和7-Er是同构的,配合物的Ln3+通过3,5-吡啶二羧酸阴离子上羧基的O原子组装成一维链状结构,而一维链状结构之间通过两个3,5-吡啶二羧酸阴离子桥连成为二维层状结构。最终通过来自于CuCN的Cu+的连接作用,配合物变成了一种三维网络状结构。对配合物4-Tb、6-Ho和7-Er的热重研究表明在温度达到400℃时,三个配合物的框架结构依然保持稳定。此外,本文还测定了配合物1-Sm、2-Eu、4-Tb、5-Dy、6-Ho和7-Er的固态荧光。
[Abstract]:Due to their attractive topological structure and their potential applications in the fields of gas adsorption, separation, fluorescence, magnetism, catalysis, electricity and ion exchange, In recent years, a lot of research work has been done on the design and construction of organometallic framework complexes. It is well known that the selection of organic ligands and metal centers is very important in the assembly of complexes, and organic ligands containing N and O atoms have strong coordination ability, so they are often used to synthesize complexes. For central metal ions, lanthanide ions are the most used because they have higher coordination number and more flexible coordination geometry, in addition, because lanthanide metals have a narrow bandwidth f-f transition, The synthesized lanthanide complexes have excellent optical properties. In this paper, the organic ligands were selected as organic ligands. 鍦ㄦ按鐑潯浠朵笅鍚堟垚浜，
本文编号：2166075
[Abstract]:Due to their attractive topological structure and their potential applications in the fields of gas adsorption, separation, fluorescence, magnetism, catalysis, electricity and ion exchange, In recent years, a lot of research work has been done on the design and construction of organometallic framework complexes. It is well known that the selection of organic ligands and metal centers is very important in the assembly of complexes, and organic ligands containing N and O atoms have strong coordination ability, so they are often used to synthesize complexes. For central metal ions, lanthanide ions are the most used because they have higher coordination number and more flexible coordination geometry, in addition, because lanthanide metals have a narrow bandwidth f-f transition, The synthesized lanthanide complexes have excellent optical properties. In this paper, the organic ligands were selected as organic ligands. 鍦ㄦ按鐑潯浠朵笅鍚堟垚浜，
本文编号：2166075
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