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Benzaldehyde

About: Benzaldehyde is a research topic. Over the lifetime, 8049 publications have been published within this topic receiving 114520 citations. The topic is also known as: Benzoic acid aldehyde & Ethereal oil of bitter almonds.


Papers
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Journal ArticleDOI
TL;DR: In this article, the knoevenagel condensation of carbonyl substrates with acidic methylene reagents proceeds smoothly in presence of zinc chloride, without the need for solvent, to produce products of good purity in high yield.

268 citations

Journal ArticleDOI
TL;DR: Carbon quantum dots (CQDs) can function as an effective near infrared (NIR) light driven photocatalyst for the selective oxidation of benzyl alcohol to benzaldehyde with high selectivity and conversion under NIR light irradiation.
Abstract: Selective oxidation of alcohols is a fundamental and significant transformation for the large-scale production of fine chemicals, UV and visible light driven photocatalytic systems for alcohol oxidation have been developed, however, the long wavelength near infrared (NIR) and infrared (IR) light have not yet fully utilized by the present photocatalytic systems. Herein, we reported carbon quantum dots (CQDs) can function as an effective near infrared (NIR) light driven photocatalyst for the selective oxidation of benzyl alcohol to benzaldehyde. Based on the NIR light driven photo-induced electron transfer property and its photocatalytic activity for H2O2 decomposition, this metal-free catalyst could realize the transformation from benzyl alcohol to benzaldehyde with high selectivity (100%) and conversion (92%) under NIR light irradiation. HO˙ is the main active oxygen specie in benzyl alcohol selective oxidative reaction confirmed by terephthalic acid photoluminescence probing assay (TA-PL), selecting toluene as the substrate. Such metal-free photocatalytic system also selectively converts other alcohol substrates to their corresponding aldehydes with high conversion, demonstrating a potential application of accessing traditional alcohol oxidation chemistry.

267 citations

Journal ArticleDOI
TL;DR: In this paper, the role of active species during selective oxidation of benzyl alcohol under visible light and the design of novel visible light active photocatalysts for selective oxidization of alcohol was investigated.
Abstract: In this study we propose several criteria for semiconductor photocatalysts suitable for visible light driven selective oxidation of BA to BAD by employing several literature-reported photocatalysts (P25, g-C 3 N 4 , In(OH) x S y , Bi 3 O 4 Br, BiOBr and Cu 2 O) to oxidize BA under visible light, and then demonstrate that the selectivity of photocatalytic oxidation of benzyl alcohol is highly depended on the position of valence band of semiconductors and Bi 12 O 17 Cl 2 nanobelts could efficiently and selectively oxidize benzyl alcohol into benzaldehyde under visible light via direct hole oxidation. Although the presence of molecular oxygen and the generation of superoxide radicals are important for the selective oxidation of benzyl alcohol, the exact role of molecular oxygen is merely to trap photogenerated electrons to produce superoxide radicals during Bi 12 O 17 Cl 2 photocatalysis, which could inhibit the recombination of photogenerated charge carries, but might not be involved in the alcohol oxidation directly. The role of molecular oxygen during Bi 12 O 17 Cl 2 photocatalysis was found to be different from those of TiO 2 and g-C 3 N 4 previously reported. This study provides new physical insights for the roles of active species during selective oxidation of alcohol under visible light and the design of novel visible light active photocatalysts for selective oxidation of alcohol.

264 citations

Journal ArticleDOI
TL;DR: In this article, the authors focused on the smooth oxidation of benzyl alcohol by air in a vapor phase process affording benzaldehyde with high selectivity and yield, using mono-and bimetallic gold-copper on silica catalyst.

252 citations

Journal ArticleDOI
TL;DR: In this paper, the photocatalytic oxidation of benzyl alcohol and its derivatives, such as 4-methoxybenzyl alcohol, 4-chlorobenzyl alcohol (CB), 4-nitrobenzinzyl al alcohol (NB), 4-(trifluoromethyl) benzyl (TRB) alcohol, and 4-tertiary-butyl-benzymethyl alcohol (TBBA), into corresponding aldehydes was investigated under both UV and visible light irradiation.

252 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023264
2022546
2021179
2020197
2019217
2018226