| In the field of coordination chemistry,pyrazole and its derivative which contained rich N and O atoms were widely used as multi-functional organic ligand,which constructed many coordination polymers(CPs)with novel structures and unique functions through reacted with various metal salts.In recent years,these coordination polymers(CPs)have shown great potential in gas storage,ion exchange,catalysis,battery,electrochemical analysis and supercapacitor,which further promoted the development of pyrazole and its derivative in the field of coordination chemistry.In view of the current development background and research trend of pyrazole and its derivative,this paper used six pyrazole and their derivatives as the main ligands to construct 17 novel coordination polymers.Their structures were determined by single crystal X-ray diffraction,the related properties of coordination polymers were tested and studied.The specific research contents of this paper are as follows:(1)Pyrazole-3-carboxylic acid(H2L1)and pyrazole-4-carboxylic acid(H2L2)were taken as the main ligands.Seven novel coordination polymers were constructed by reacting with various transition metal salts with the help of auxiliary ligand by solvothermal reaction and diffusion method.Among them,pyrazol-3-carboxylic acid(H2L1),which reacted with metal salts Cu2+and Cd2+respectively,finally constructed one-dimensionalchaincomplexes[Cu2(L1)2(4,4'-bpy)]n(1),[Cd(HL1)Cl(1,10'-phen)]n(2).Pyrazol-4-carboxylic acid(H2L2),which reacted with metal salts Cu2+,Ni2+,Zn2+and Pb2+respectively,finally constructed zero-dimensional single molecule[Ni(HL2)2(H2O)4]·6H2O(5)and one-dimensional chain structure[Pb(HL2)2(H2O)]n·n H2O(7)and two-dimensional network structures[Cu(L2)(1,10'-phen)]n·n H2O(3),[Cu(L2)(2,2'-bpy)]n·n H2O(4)and[Zn2(HL2)2(HPTA)(H2O)4]n·2n H2O(6).In addition,the thermal stabilities,spectral properties and electroluminescence properties of complexes 1-5 were investigated.Supercapacitive properties of complexes 3 and 4 were tested.(2)1-substituted-1H-[1,2,3]-triazole-4-carboxylic acid ligand(H2L3)was taken as the main ligand.Six novel coordination polymers were constructed by reacting with various transition metal salts(Ni2+,Cu2+,Mn2+,Zn2+,Co2+)with the help of auxiliary ligands(2,2'-bipyridine,1,10-Phenanthroline)by slow evaporation technique,solvothermal reaction and diffusion method,respectively.These coordination polymers were[Ni(HL3)2(1,10'-phen)]·H2O(8),[Cu(HL3)(Cl)(2,2'-bpy)](9),[Ni(HL3)2(2,2'-bpy)]·H2O(10),[Mn(HL3)2(H2O)2](11),[Zn(HL3)2(H2O)2](12)and[Co(HL3)2(H2O)2](13).The thermal stabilities,spectral properties and electroluminescence properties of complexes 8-12 were investigated.(3)Pyrazole(HL4),1-methyl-1H-pyrazole-4-sulfonyl chloride(HL6)and4-cyanopyrazole(HL8)were used as initial ligands.Among them,pyrazole(HL4)and1-methyl-1H-pyrazole-4-sulfonyl chloride(HL6)underwent in situ and hydrolysis respectively during the self-assembly process,resulted in the production of new ligands dipyrazolemethane(L5)and 1-methyl-1H-pyrazole-4-sulfonic acid(HL7),which finally participated in the constructed process of the two-dimensional network complex[Cu2(L5)(?-S)2]n(14)and two zero-dimensional single-molecule structures[Co(L7)2(H2O)4](15)and[Mn(L7)2(H2O)4](16).The ligand 4-cyanopyrazole(HL8)was self-assembled with Cd2+to form a one-dimensional chain complex[Cd(HL8)2(?-Cl)2]n(17).In addition,the thermal stabilities,spectral properties and electroluminescence properties of complexes 15-17 were investigated. |
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