Study On The Structure Of Triphenylamine Carboxylic Acid Coordination Polymer And Its Functional Application In Explosive Detection

The self-assembly of emerging engineering architectures,especially metal-organic frameworks（MOF）has been extensively studied in various scientific fields,including energy storage and separation,sensing,drug delivery,catalysis,molecular magnetism,and chiral resolution.In this paper,a series of transition metal complexes were synthesized by solvothermal synthesis method,and their crystal structure,purity,optical properties,thermodynamic stability,specific surface area and adsorption properties were analyzed and studied.In addition,fluorescence sensing of the nitro complexes was studied,combining their optical properties.The main contents are as follows:First of all,the MOF materials 1 and 2 were synthesized by coordination between ligand L1and the transition metal Cd（Ⅱ）and Pb（II）ions.Among them,complex 1 is a two-dimensional layer-like structure,and complex 2 is a three-dimensional network structure,and the crystal structure,thermal stability and optical properties of the two complexes were studied.Secondly,On the basis of the ligand L1,the ligand L2 was synthesized by design,and the tetrazolium group was introduced.Then,by coordination between ligand L2 and transition metal Cd（Ⅱ）,Zn（Ⅱ）,Pb（II）ions,three novel complexes 3,4 and 5 were synthesized,and complex 3 is a three-dimensional structure and selective to TNP.Finally,ligand L3 was designed,through coordinating with the transition metal Cd（II）ion,we obtain a new three-dimensional complexes 6,Herein,the O atoms on the carboxyl group of ligand L3 and the N atoms on the tetrazolium group participate in the coordination,The crystal structure analysis shows that it has a high porosity rate,and 6 is selective to TNP.The specific surface area and adsorption performance of CO₂ gas were determined by N₂adsorption method.The results show that complex 6 has good adsorption to both N₂ and CO₂.According to the N₂ adsorption experimental data,the Langmuir and BET surface areas were1391.07 m²/g and 48.34 m²/g.Summarizing,we designed and synthesized three kinds of organic ligands.By coordinating with transition metal ions,six kinds of complexes with novel structures were synthesized.The application of these complexes in the sensing of nitro compounds and gas adsorption were studied.