| In recent years,due to the diversity of metals and the designability of organic ligands,coordination polymers(CPs)have abundant structures and applications.So far,the application of coordination polymers in catalysis,chemisorption,luminescent,electrochemistry,ion recognition,separation and magnetic,have been widely studied and made great progress.Complexes based on imidazole/triazole ligands not only have excellent optical,electrical,magnetic and other physical properties,but also have good applications in bacteriostasis,anti-cancer,anti-virus and chemical catalysis.Carboxylic acid ligands can coordinate with most metals and have good coordination ability,and the ability to form coordination bonds with trivalent and tetravalent metals is strong.And the carboxylate have negative charge,which can neutralize the positive charge in metal ions and metal clusters.In this way,the pores of the formed complex do not need to contain anions that counteract metal ions and metal clusters,which can make the complex have higher porosity and stability.In this paper,seven rare earth metal complexes and six transition metal complexes were synthesized by hydrothermal method using 2-(4-(1H-1,2,4-triazol-1-yl)phenyl)-1H-benzo[d]imidazol-5-carboxylic acid and 2-(4-(1H-imidazol-1-yl)phenyl)-1H-benzo[d]imidazol-5-carboxylic acid ligands.And respectively on their structure and performance study,first through the infrared to the structure of the complexes was determined preliminarily,followed by X-ray single crystal diffraction is used to determine the accurate structure of complexes,the complexes by X-ray powder diffraction to determine the phase purity,further understanding of complexes by thermogravimetric analysis and stability performance.Finally,we further studied the 13 complexes,including fluorescence properties,magnetic properties,dye adsorption and electrochemical properties.1?Two long-chain rigid ligands were synthesized:2-(4-(1H-1,2,4-triazol-1-yl)phenyl)-1H-benzo[d]imidazole-5-carboxylic acid(H2L1)and 2-(4-(1H-imidazol-1-yl)phenyl)-1H-benzo[d]imidazole-5-carboxylic acid(H2L2).2?Seven rare earth metal complexes were synthesized by H2L1 ligands[Pr(HL1)(NO3)2(H2O)3]2(1),[La(HL1)(NO3)2(H2O)3]2(2),[Nd(HL1)(NO3)2(H2O)3](3),{[Sm7(HL1)9(?3-OH)8(H2O)6](Br)2(OH)4·4.5H2O(4),{[Eu7(HL1)9(?3-OH)8(H2O)6](Cl)2(OH)4·4.5H2O(5),{[Gd7(HL1)9(?3-OH)8(H2O)6](Cl)2(OH)4·4.5H2O(6)and{[Ho7(HL1)9(?3-OH)8(H2O)6](Cl)2(OH)4·4.5H2O(7).Among them,complexes 1,2and 3 are zero-dimensional dinuclear structure,and complexes 4,5,6 and 7 are two-dimensional network structures composed of hepta-nuclear structural units.and the seven complexes were subjected to phase purity and thermal stability,fluorescence performance and adsorption performance were studied,and the results showed that these seven complexes all have good phase purity,thermal stability and fluorescence performance.Among them,complexes 1 and 3 have good adsorption properties for Congo red dye.3?Six transition metal complexes were synthesized by H2L1 and H2L2 ligands[Mn(HL1)2(H2O)4](8)?[Co(HL1)2(H2O)4](9)?[Ni(HL1)2(H2O)4](10)?[Co(HL2)2(H2O)4](11)?[Ni(HL2)2(H2O)4](12)and[Mn(HL2)2(H2O)4](13).These six complexes are mononuclear structures,and the phase purity,thermal stability,magnetism and electrochemical properties of these six complexes were respectively carried out.The performance has been studied,and the results show that these six complexes all have good phase purity,thermal stability and magnetism.Among them,the complexes 8,9,11 and13 have a certain capacitance,and the complex 8 has better cycle stability and higher capacitance,and can be used as an alternative material for capacitors. |
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