Photocatalytic Oxidative Esterification of Benzaldehyde with the Participation of Crystalline Carbon Nitride

IF 0.9 4区 化学 Q4 CHEMISTRY, MULTIDISCIPLINARY
G. V. Korzhak, T. R. Stara, S. Ya. Kuchmiy
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引用次数: 0

Abstract

It has been established that crystalline carbon nitride obtained by heat treatment of g-C3N4 in molten KCl and LiCl salts exhibits photocatalytic activity in the oxidative esterification of benzaldehyde in methanol and ethanol solutions. The reaction proceeds only in the presence of palladium ions, which are reduced with the alcohols in situ, and acid, which promote benzaldehyde acetalization. A probable mechanism of the photocatalytic process is proposed, which involves the oxidation of acetal by a superoxide ion radical, the subsequent interaction of the formed acetal radical with an oxygen molecule, the formation of a tickle organic peroxide and its fragmentation according to the Russell mechanism with the formation of benzoate.

Abstract Image

结晶氮化碳参与下苯甲醛的光催化氧化酯化反应
在熔融KCl和LiCl盐中热处理g-C3N4得到的结晶氮化碳在甲醇和乙醇溶液中对苯甲醛的氧化酯化反应表现出光催化活性。反应只有在钯离子存在的情况下才能进行,钯离子会被原位的醇还原,而酸会促进苯甲醛的缩醛化。提出了一种光催化过程的可能机制,包括缩醛被超氧离子自由基氧化,形成的缩醛自由基随后与氧分子相互作用,形成有机过氧化物,并根据罗素机制与苯甲酸盐形成断裂。
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来源期刊
Theoretical and Experimental Chemistry
Theoretical and Experimental Chemistry CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
10.00%
发文量
30
审稿时长
6-12 weeks
期刊介绍: Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as: a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials; b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions; c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.
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