【摘要】：金屬-有機框架(MOFs)是金屬離子和有機配體通過配位鍵組裝而成,作為新一代的高孔隙度的分子晶體材料在最近的二十多年中被廣泛的研究與報道,這是由于它們迷人的晶體結構與各種各樣的潛在應用,如氣體的存儲與分離、催化、磁性、熒光、化學傳感等。本文通過設計合成了新的氮雜環(huán)有機配體,通過水熱法合成了新的金屬-有機框架配合物,并對其結構和性能進行了表征與測試。具體內容分為以下幾個部分:第一部分;介紹金屬-有機框架的發(fā)展背景、合成方法、影響因素、性能測試等。第二部分;設計并合成了剛性的2,3,5,6-四(4-羧基苯基)吡嗪配體,和不同的金屬鹽在水熱條件下合成了六個多孔的金屬-有機框架材料:{Cd(L1)×2H_2O}n(1),{Pb_2(L1)}n(2),{La(L1)×H_2O×2.7 H_2O}n(3),{Sr_3(L1)2×6H_2O×2.6 H_2O}n(4),{Ce(L1)×4H_2O×H_2O}n(5),{Mn_2(L1)}n(6),并對其結構進行了表征。測試了配合物的熱重、固態(tài)紫外、固態(tài)熒光、氣體吸附、電化學催化析氫等性能。配合物表現出良好的熱穩(wěn)定性,分解溫度都能達到450°C左右。配合物1和4相對于L1配體展現出明顯的熒光增強性能,可作為潛在的熒光材料。氣體吸附實驗發(fā)現配合物3和6展現出非常好的N2吸附性能,并對配合物6做了H_2的吸附測試。配合物2和5展現出一定的電化學析氫性能。第三部分;設計并合成了柔性的四齒咪唑配體,隨后與不同的羧酸組裝了四個金屬-有機框架配合物:{Co(L2)A}n(L2=2,3,5,6-四(4-亞甲基-1-咪唑苯基)吡嗪A=5-硝基間苯二甲酸)(7),{Co(L2)·2H_2O}n(8),{Co(L2)B}n(B=4,4`-二苯醚二甲酸)(9),{Mn_2(L2)C_2}n(C=1,4萘二甲酸)(10)。通過單晶X-射線衍射對其結構進行了確認,并通過P-XRD,紅外對結構進行了表征。測試了部分化合物的性能,配合物8展現出良好的催化析氫性能。第四部分;全文總結。
[Abstract]:Metal-organic framework (MOFs) is composed of metal ions and organic ligands assembled by coordination bonds. As a new generation of molecular crystal materials with high porosity, (MOFs) has been widely studied and reported in recent twenty years. This is due to their fascinating crystal structure and various potential applications, such as gas storage and separation, catalysis, magnetism, fluorescence, chemical sensing, etc. In this paper, a new organic ligand with heterocyclic nitrogen was designed and synthesized, and a new metal-organic frame complex was synthesized by hydrothermal method. Its structure and properties were characterized and tested. The content is divided into the following parts: the first part introduces the development background of metal-organic framework, synthesis methods, influencing factors, performance testing and so on. 絎簩閮ㄥ垎;璁捐騫跺悎鎴愪簡鍒氭，

本文編號：2241501