溶剂对1,3-二甲基取代尿嘧啶臭氧反应能力的影响

IF 2.1 4区 环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL
A. A. Maksyutova, Yuriy S. Zimin, A. Mustafin
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引用次数: 0

摘要

摘要利用紫外光谱法研究了臭氧在不同极性溶剂(Н2О和CCl4)中对三种氮基代表碱(1,3-二甲基胸腺嘧啶、1,3,6-三甲基尿嘧啶和5-羟基-1,3,6-三甲基尿嘧啶)的反应能力。在研究的第一阶段,确定了1,3- dmu在所选溶剂中的消光系数。下一阶段,在鼓泡装置的帮助下,研究了1,3-二甲基取代尿嘧啶溶液在室温(295°K)下吸收臭氧的动力学。确定了母体化合物(О3和1,3- dmu)以等摩尔关系反应,即消耗1 g-mol的尿嘧啶对应于吸收1 g-mol的臭氧。根据母体化合物消耗的化学计量学和动力学数据,得出了明显而明确的结论:所研究的反应符合二级动力学定律(一级-关于О3和一级-关于1,3- dmu)。在进一步的研究过程中,研究了温度(从285°K到309°K)对二阶速度常数的依赖关系,并确定了臭氧反应中Arrhenius方程的参数。在非极性有机溶剂(CCl4)介质中,臭氧与1,3- dmu的反应速率常数大于极性溶剂(Н2О)介质中的反应速率常数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Solvent upon Reactive Capacity of Ozone in Respect of 1,3-Dimethyl-Substituted Uracils
ABSTRACT Reactive capacity of ozone in respect of three representatives of the nitrogenous bases (1,3-dimethylthymine, 1,3,6-trimethyluracil, and 5-hydroxy-1,3,6-trimethyluracil) in two solvents having different polarities (Н2О and CCl4) was investigated with the help of the ultraviolet spectroscopy method. At the first stage of investigations, coefficients of extinction of 1,3-DMU in the selected solvents were determined. At the next stage, kinetics of absorption of ozone by solutions of 1,3-dimethyl-substituted uracils at room temperature (295°K) was studied with the help of the bubbling equipment. It was established that parent compounds (О3 and 1,3-DMU) react in the equimolar relationships, that is, 1 g-mol of the consumed uracil corresponds to 1 g-mol of the absorbed ozone. On the basis of the data on the stoichiometry and kinetics of consumption of the parent compounds, obvious and definitive conclusion was made: the reactions under investigation comply with the kinetic law of the second order (of the first order – in respect of О3 and of the first order – in respect of 1,3-DMU). In the course of further investigations, temperature (from 285°K up to 309°K) dependences of constants of velocities of the second order were investigated, as well as parameters of the Arrhenius equation in respect of reactions of ozone were determined. It was established that the reaction rate constants of reactions between ozone and 1,3-DMU within the medium of the nonpolar organic solvent (CCl4) exceed the reaction rate constants within the medium of the polar solvent (Н2О).
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来源期刊
Ozone: Science & Engineering
Ozone: Science & Engineering 环境科学-工程:环境
CiteScore
5.90
自引率
11.10%
发文量
40
审稿时长
2 months
期刊介绍: The only journal in the world that focuses on the technologies of ozone and related oxidation technologies, Ozone: Science and Engineering brings you quality original research, review papers, research notes, and case histories in each issue. Get the most up-to date results of basic, applied, and engineered research including: -Ozone generation and contacting- Treatment of drinking water- Analysis of ozone in gases and liquids- Treatment of wastewater and hazardous waste- Advanced oxidation processes- Treatment of emerging contaminants- Agri-Food applications- Process control of ozone systems- New applications for ozone (e.g. laundry applications, semiconductor applications)- Chemical synthesis. All submitted manuscripts are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees.
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