Synthesis And Properties Of Indazole Carboxylic Acid Metal Complexes

Metal Organic skeleton(Metal-Organic Frameworks,MOFs)materials,or ion cluster is a kind of Metal ions and Organic ligands by coordination bond self-assembly are infinitely orderly space structure of inorganic Organic hybrid and amorphous materials,the permanent hole in the gas adsorption,separation,storage has been widely used,is a very promising new type of functional material.This paper designed two new indazole derivatives,indazole-3-carboxylic acid as raw material,the synthetic ligand 1-successful carboxymethyl-1H-indazole-3-carboxylic acid(H₂L)(ligand-?)and 1-(6-(3-carboxyl-1H-indazole))-2-(dimethyl amine)-4-pyrimidine base-1H-indazole-3-carboxylic acid(ligand-?);Coordination of ligand-?and a variety of metal salt,was prepared multiple indazole carboxylic acid complexes,also studied the various complexes in light catalysis and organic catalytic performance experiment,the main research content is as follows:(1)The synthesized 1-carboxymethyl-1H-indazole-3-carboxylic acid was used as t he organic ligand,and the ligand was characterized by ¹H NMR,IR and single crysta l data.Six novel complexes were prepared under optimal reaction conditions with six different metal salts(Co Cl₂·6H₂O?Ni Cl₂·6H₂O?Mn Cl₂·4H₂O?Zn Cl₂?Cd Cl₂·2.5H₂O?Cu Cl₂·2H₂O).Complex1:[Co H₂L(H₂O)₂]·2H₂O;Complex2:[Ni H₂L(H₂O)₂];Complex3:[Mn₄H₂L(H₂O)];Complex4:[Zn H₂L(H₂O)];Complex5:[Cd₂(H₂L)₄(H₂O)₄]·2H₂O;Compl ex6:[Cu(H₂L)₂(H₂O)]·3H₂O.The structures of the 6 complexes were characterized by X-ray single crystal diffractometer,IR,TG,PXRD and other instruments.The results s howed that the complexes Mn and Cd had binuclear structures,while the other compl exes had monuclear structures.The ligand presented 6 coordination modes in 6 novel indazole carboxylic acid complexes,of which Cd complexes presented 2 ligand modes,and the influence of synthesis conditions on the internal structure of the complexes was analyzed.(2)Through the synthesis of solid complexes of ultraviolet-visible diffuse reflection spectrum(UV-Vis)test,fitting out five complexes of band gap value,will also be part of the complexes as catalyst of light photocatalytic degradation of Rh B dye experiment,found the Eu complexes has good effect on degradation of Rh B solution,within 60 min degradation rate is as high as 93.82%,its performance is better than that of reported from the related literature,this paper also study on the degradation reaction mechanism,the results show that the degradation reaction of zero order reaction.In addition,the photocatalytic degradation of free radicals was analyzed,and the results showed that the active intermediate of the degradation reaction was hydroxyl radical(·OH).(3)To benzaldehyde as starting materials,malononitrile as reaction reagent,ethanol as the solvent,the temperature is 70?under the Knoevenagel reaction,determine the best time and the best conditions,using the Co catalyst for 12 different derived class benzaldehyde catalyzed experiments,purified by column chromatography method for compounds,and through the ¹H NMR,ms and structure characterization of condensation products.The results show that Co L₂has good catalytic performance and can be reused.