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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Effect of Sorbic Alcohol on the Radiolysis of Aromatic Compounds in Aqueous Solution
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Effect of Sorbic Alcohol on the Radiolysis of Aromatic Compounds in Aqueous Solution

机译：山梨醇对水溶液中芳香族化合物辐射分解的影响

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摘要

Sorbic alcohol (CH_3CH=CHCH=CHCH_2OH) and 2-phenylethanol (C_6H_5CH_2CH_2OH) or phenylacetic acid/phenylacetate (C_6H_5CH_2COOH/C_6H_5CH_2COO~-) have been studied as a model for the conjugated double bond (C-C=C-C=C-C-NH-) and phenyl (C_6H_5-C-C-O-) residues in 3-amino-9-methoxy-2,6,8-trimethyl-10-phenyl-4,6-dienoic acid. The latter is known to play a key role in the toxicity of microcystins, which are well-known natural toxins found in water. Particular attention was focused on studying the products of the ionizing radiation-induced organic peroxyl radical intermediates in the separated systems compared to those obtained in the mixed solutions of sorbic alcohol and the aromatic compounds. The aromatic hydroxylation and peroxide yields reflect the respective reaction rate constants of the above solutes with OH radicals at pH 7.0. In contrast, at pH 3.1 the effect of sorbic alcohol on decreasing the aromatic hydroxylation and increasing the peroxide yields is considerably higher than expected on the basis of OH scavenging only. The results are discussed in terms of scrambled reactions between the peroxyl radicals in light of the lack of observed products arising from phenyl hydroxylation in the photocatalytic destruction of microcystin.
机译：研究了山梨醇（CH_3CH = CHCH = CHCH_2OH）和2-苯基乙醇（C_6H_5CH_2CH_2OH）或苯乙酸/苯乙酸酯（C_6H_5CH_2COOH / C_6H_5CH_2COO〜-）作为共轭双键（CC = CC = CC-NH-）的模型， 3-氨基-9-甲氧基-2,6,8-三甲基-10-苯基-4,6-二烯酸中的苯基（C_6H_5-CCO-）残基。已知后者在微囊藻毒素的毒性中起关键作用，微囊藻毒素是在水中发现的众所周知的天然毒素。与在山梨醇和芳族化合物的混合溶液中获得的产物相比，在分离体系中电离辐射诱导的有机过氧自由基中间体的产物特别受关注。芳族羟基化和过氧化物的产率反映了上述溶质与pH 7.0下的OH基的各自反应速率常数。相反，在pH 3.1下，山梨醇对减少芳族羟基化和增加过氧化物产率的影响明显高于仅基于OH清除的预期。鉴于缺乏观察到的由微囊藻毒素的光催化破坏中苯基羟基化引起的产物，根据过氧自由基之间的加扰反应讨论了结果。

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