Synthesis And Properties Of Nickel Or Bismuth Complexes With Nitrogen Heterocyclic And Carboxylic Acid Ligands

Nickel is a trace element in the biosystem,which exists in a series of enzymes of organisms.It has the functions of promoting red blood cell regeneration and stimulating blood production.China has abundant bismuth resources,and bismuth complexes can be used in many fields such as catalysis and antibacterial.Therefore,nickel,bismuth and their compounds have aroused great interest in many fields.In this thesis,seven kinds of nitrogen–containing heterocyclic rings and carboxylic acid nickel???and bismuth???complexes were synthesized by hydrothermal method,room–temperature solid–phase method and liquid–phase method.The composition and structure of the complexes were characterized by titration analysis,elemental analysis,X-ray single crystal diffraction,X-ray powder diffraction analysis,infrared spectra,thermal analysis and so on.And the index calculation of X-ray powder diffraction data was carried out by using the computer program of least squares method.In order to explore the practicability of bismuth???complexes,the photocatalytic degradation performance of the organic dye rhodamine B?RhB?was also tested in this paper.In addition,nano-nickel oxide was prepared by using the synthesized[Ni?H₂pda??pda?]·3H₂O as precursor.The main work of this paper is as follows:?1?Two kinds of the complexes[Ni?6,6'-Hbpdc?₂]·4H₂O?light green block crystal?,[Ni?5,5'-Hbpdc?₂]·4H₂O?green prismatic crystallites?were synthesized with nickel oxide or nickel acetate and 2,2'-bipyridine-5,5'-dicarboxylic acid?5,5'-H₂bpdc?or 2,2'-bipyridine-6,6'-dicarboxylic acid?6,6'-H₂bpdc?as main raw materials.?2?[Ni?H₂pdc??pdc?]·3H₂O?green bulk crystal?was synthesized using 2,6-pyridinedicarboxylic acid?H₂pdc?as the ligand and nickel acetate as the nickel source.Using the unpurified complex after solid–phase milling as the precursor,nano–sized nickel oxide was prepared by the high–temperature calcination method.Experiments results show that the diffraction peaks of nickel oxide strengthen with the increases of pyrolysis temperature,which indicates that the crystalline grain size of NiO gradually increases and its crystal shape grows more completely.?3?Using 2-methylimidazole?2-MI?and 3-amino-5-carboxytriazole?H₂atrc?as ligands,the complex[Bi₂Cl₁₀]?2-HMI?₄?colorless transparent prismatic crystal?and[Bi?Hatrc?]·1.5H₂O?white crystallites?were respectively synthesized with bismuth chloride and bismuth nitrate through different synthetic methods.The experimental results show that the complex,[Bi₂Cl₁₀]?2-HMI?₄,exhibits a better photocatalytic degradation activity for the organic dye RhB.?4?NH₄[Bi?trans-cydta??H₂O?₂]·4H₂O?colorless transparent crystallites?was synthesized by the solution growth method using trans-1,2-cyclohexanediamine-tetraacetic acid?trans-H₄cydta?as the ligand and bismuth oxide as the source of bismuth source.[Ni?H₂O?₆]?H₂btca??green bulk crystal?was synthesized using1,2,4,5-benzenetetracarboxylic acid?H₄btca?as the ligand and nickel acetate as the nickel source.