Research On The Influence Of Photosensitive Catalytic On B-Z Oscillation Reaction And The Mechanism

A large part of the vibrant life phenomena are presented by a variety of chemicaloscillating reactions, the metabolism of intracellular calcium ions and the photosynthesis ofthe green plants is the representatives. In recent years, one of the fiery researches is the B-Zoscillating reaction catalysied by four nitrogen impurity macrocyclic copper complexes. Byanalyzing the structure of the complexes, we found it is similar to the structure of chlorophyllin green plants, the core of the photosynthesis in green plants is completed by the catalysis ofchlorophyll, it’s the most basic material metabolism process in biology, it’s the foundation ofall biological energy. Therefore, studying the light on the B-Z oscillating reaction catalyzedby such complexe have reference value for research the mechanism of the photosynthesis ofgreen plants, which is of far-reaching significance.While the research about light on B-Zoscillation reactions will be an important role in the study and development of new energy.The research of its mechanism is of great significance to promote the progress of science.This thesis studied the complicated photochemical behavior of the chemical oscillationsystem catalyzed by [CuL](ClO4)2and its mechanism are studied futher. Its main contents areas follows:1. according to the method of literature, homemade the catalyst [CuL](ClO4)2, andthen it was synthesized and identified by I.R. Spectrum, the experimental results wereconsistent with literature.2. Establish the B-Z oscillating system:[CuL](ClO4)2-sulfuric acid-malic acid-sodium bromate. Studying the influence of the illumination of the oscillationsystem: the experimental results indicated that the chemical oscillations exhibitedultrasensitive response to illumination, the amplitude of oscillation were significantly changedbut the frequency remained unaffected. Then optimizing the reactants’ concentration whichinterference maximum by245nm UV-light are:[H2SO4]0=1.05M，[malic acid]0=0.21M，[NaBrO3]0=0.015M,[[CuL](ClO4)2]0=0.0039M. When the245nm UV-light intensitychanges from450Lux to1300Lux, There was a good linear relationship between thevariation of amplitude△Am and the intensity. The correlation coefficient r2=0.9760.Increase in UV-light intensity could enhance inhibition on the oscillations. In addition, wemake the correlation diagram of the Pt and Br—electrode’s potential at the same point in time,when the UV irradiation oscillation system, Appear the signs of lost track. the reactionmechanism is discussed.3. Establish another B-Z oscillating system:[CuL](ClO4)2-H2SO4-Glucose-acetone-NaBrO3System, Studying the influence of the illumination of theoscillation system: the experimental results indicated that the chemical oscillations exhibitedultrasensitive response to illumination, the amplitude of oscillation were significantly changed but the frequency remained unaffected. Then optimizing the reactants’ concentration whichinterference maximum by245nm UV-light are:[H2SO4]0=1.05M,[acetone]0=0.65M,[glucose]0=0.06M,[NaBrO3]0=0.08M,[[CuL](ClO4)2]0=0.05M. When the245nmUV-light intensity changes from450Lux to1300Lux, There was a good linear relationshipbetween the variation of amplitude△Am and the intensity. The correlation coefficient r2=0.9988. Increase in UV-light intensity could enhance inhibition on the oscillations. In addition,we make the correlation diagram of the Pt and Br—electrode’s potential at the same point intime, when the UV irradiation oscillation system, Appear the signs of lost track; the reactionmechanism is discussed.4. Through the mathematical calculation software Mathematic5.0.simulate the two reaction mentioned above. and prove that assumption mechanism. Thesimulation of the oscillation behavior with UV-light. Only the parameters n changes with thelight on a intensity linear, other parameters do not change, the theoretical results go with theexperimental results.