Study On Microporous Coordination Polymers Of Arenesulfonate Ligands

Metal-organic coordination polymers which are constructed by the multifunctional ligands and metal ions have attracted much attention for their potential use in conductivity, separation, adsorption and catalyst. Among these metal-organic coordination polymers, many are synthesized by the N-containing ligands, carboxylates and phosphate ligands. Compared with this kinds of ligands, synthesizing polymers with aromatic carboxylate ligands which adding sulfo-group has been relatively less studied. In this paper, 1,4-Naphthalic Acid as main raw material was synthesized into ligand containing sulfonyl group by directly sulfonated. Complexes of arenesulfonte ligands have been obtained and structural、thermal stability and pore diameter distribution were characterized by IR、DSC、TG and gas adsorption. The main contents and results are summarized as follows:1、1,4-Naphthalic Acid containing sulfonyl group was synthesized by sulfonation, and the conditions of its synthesis were discussed. Products were characterized through melting point detector, IR, TG-DTG-DSC and H-NMR.2、18 types of complexes are synthesized by aqueous solution, diffusion, solvothermal and hydrothermal methods, using SNDC as ligand. The FT-IR spectra between 4000-400cm-1 of complexes are determined and theνas andνs of carboxyl groups have been assigned that can identify the coordination modes of carboxyl groups. In addition, the crystal structure of BPY(NO3)2 was characterized.3、Exothermic process of Pb(SNDC) and Co(SNDC) is studied by TG-DTG and DSC. Decomposition kinetics of Pb(SNDC) and Co(SNDC) are studied according to 38 of common mechanism functions. Kissinger, Ozawa, integral and differential methods were used to calculate the non-isothermal kinetics of the thermal decomposition of the coordination polymers. The model function of complexes were confirmed. By the thermodynamic parameters, apparent activation energy and pre-exponential factor of thermal decomposition process are calculated.4、Microporous structure of several complex have been characterized based on N2 adsorption isotherm at 77K. The adsorption data between 0~1 of relative pressure showed the amounts of absorbed N2 is almost completely saturated at the temperature of liquid nitrogen. The shape of isotherm is TypeⅡand adsorption-desorption process is reversible. In this paper, novel structure complexes have been designed and synthesized. The structures and properties of complexes are analyzed. Studying on relation between structures and properties of complex indicate the potential uses of these materials in the fields of materials. In addition, techniques of synthesis in this paper are benefit for further investigation on novel functional complex.