The Synthesis Covalent Functionalization Of New Complexes And Study On Their Properties

Metal–organic frameworks （MOFs） are an important class of hybrid inorganic–organicmaterials. Within the last two decades, metal–organic frameworks（MOFs） have emerged as promising hybrid materials in the areas of gas sorption, catalysis,separation, drug delivery, and biological-imaging. MOFs are inorganic–organic solids thatform porous crystalline structures and can be synthesized by using a wide range of metal ionsand organic ligands. It is well known that the choice of metal ion and organic ligand candictate the framework topology （affecting pore size and shape） and influence the overallchemical functionality of the framework. The choice of metal and organic building blocks canalso greatly affect the uptake properties and host–guest interactions within the framework,which in turn can affect the performance of the MOF as a storage, catalytic, or separationsmaterial.According to the above-mentioned characteristics of MOFs, We designed andsynthesized a series of Long-chain organic ligands containing carboxyl. By self-assemblywith the divalent zinc ion generate new MOFs. And detect the effect of its application inadsorption sensing after functional.My frist chapter report on how to choice metal ion and organic ligand, structureof traits and synthesis methods. The postsynthetic modification （PSM） of MOFs was provided.The use of PSM to develop MOFs with improved gas sorption, catalytic activity, bioactivity,and more robust physical properties is discussed. The results reported to date clearly showthat PSM is an important approach for the development and advancement of these hybridsolids.In the second chapter, our main content is functionalization there MOFs and sensingheavy metal ions(Hg²⁺and Cu²⁺), their properties and removal efficiency will be studied.Following by the MOF will used to remove harmful gases formaldehyde.The result showed that Hg²⁺、Cu²⁺、Fe³⁺can be selectively recognized and sensed byMOF（S1） in acetonitrile or aqueous solution，and the sensibility and selectively for Hg²⁺washighest than Cu²⁺、Fe³⁺. The removal efficiency of functionalization Gd-MOF for Hg²⁺is94%in45min. However, removal efficiency of functionalization Al-MOF for Cu²⁺is only40%in 150min. The reason may be due to Gd-MOF and Al-MOF have different spatial structure.The last chapter, the three organic carboxylic acid ligands（L1、L2、L3） and two MOFs（S1、S2） were synthesized. Their synthesis method and characterization of1H NMR、XRDspecrum will be given. The structure of S2will also be introduced.