鄰苯二酚乙胺與環(huán)境友好型溶劑的相互作用研究
[Abstract]:Natural water contains some phenols and amines because of the pollution of industrial wastewater and domestic sewage. Long-term intake of phenol-containing water can cause insomnia, anemia and other poisoning symptoms. Therefore, it is of great significance to detect the content of this kind of substances. Catechol ethylamine is an important biomolecule, which contains phenolic hydroxyl and amino groups, and has little pollution to the environment. Taking catechol ethylamine as an example, a detailed study on its performance and content can provide some theoretical basis for other phenols and amines. In addition, appropriate solvents should be selected for the determination of properties and contents, and solvent properties and solvent effects (such as dielectric effect, salt effect, dissociation effect, solvent-solute interaction, etc.) will affect solute properties. The chemical reaction process and the reaction product have important influence. The study of the interaction between catecholamines and solvents can provide a theoretical basis for the research and application of phenols and amines in the fields of environmental chemistry, drug chemistry and life sciences. In this paper, two environment-friendly solvents, water and ionic liquid, which are commonly used in the determination of catecholamines, are chosen as the research objects. The interaction between them and catechol ethylamine hydrochloride (3,4-dihydroxyphenethylamine hydrochloride, abbreviated as DH) was studied by electrochemical and nuclear magnetic resonance (NMR) methods. The effects of two solvents on the micro-environment of DH were investigated, and the density functional calculation and topological analysis of the hydrogen-bonded complexes formed by water and DH were carried out by quantum chemistry. Firstly, the effects of water and ionic liquids on the properties of DH and their interactions were studied by cyclic voltammetry and nuclear magnetic resonance (NMR). The experimental results show that water can stabilize DH and inhibit the electrooxidation of catechol ethylamine to a certain extent. With the increase of DH concentration, the interaction between DH and solvent increased. However, there is a 蟺-蟺 stacking interaction between the imidazole ring of ionic liquids and the benzene ring of DH. The results of the two interactions make DH more prone to electrooxidation and thus enhance its electrochemical activity. Secondly, the hydrogen bonding between water and protonated catechol ethylamine (DH) and catechol ethylamine was studied by density functional theory (DFT), and the geometric configuration of hydrogen bond complex formed between water and protonated catechol ethylamine was optimized. A series of parameters of various hydrogen bond complexes are discussed theoretically. It was found that the formation of hydrogen bond effectively protected the two hydroxyl groups on catechol ethylamine, which made it difficult to remove the H above it, inhibited the electrooxidation of catechol ethylamine to a certain extent, and enhanced the stability of catechol ethylamine. Finally, the topological analysis of the calculation results of water and DH is carried out by means of the atom theory (AIM) in molecules, and the existence of hydrogen bonds is further confirmed. The theoretical and experimental results are in agreement with each other. Exploring the interaction mode between catechol ethylamine molecule and environment friendly solvent can provide a reference for the extraction and separation of other complex phenol and amine compounds in wastewater, and provide reference for the selection of appropriate solvents for the extraction and separation of other complex phenol and amine compounds in wastewater. And reduce the environmental pollution during the experiment; It is also of great significance for the removal of residual catechol ethylamine in environmental pollution and the detection of phenols and amines in wastewater.
【學(xué)位授予單位】:河南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:X832
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