Selective Oxidation of Alcohols Using Photoactive VO@g-C<sub>3</sub>N<sub>4</sub>

Verma, Sanny; Baig, R. B. Nasir; Nadagouda, Mallikarjuna N.; Varma, Rajender S.

doi:10.1021/acssuschemeng.5b01163

Cited by 97 publications

(42 citation statements)

References 32 publications

(42 reference statements)

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“…‐ Recently Sanny et al reported a bimetallic catalyst on a graphitic carbon nitride (AgPd@g‐C 3 N 4 ) for conversion of biomass‐derived levulinic acid under visible light. In a subsequent report they described a photoactive VO@g‐C 3 N 4 catalyst for the C‐H activation and selective oxidation of alcohols to the corresponding aldehydes and ketones …”

Section: Introductionmentioning

confidence: 99%

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C₃N₄) for Visible Light−Assisted Esterification of Aldehydes

Kumar

Pathak

et al. 2017

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Azide containing bipyridine complex of cobalt was grafted to the propargylated nanoporous graphitic carbon nitride (npg‐C3N4) via click reaction to obtain heterogenized photocatalyst which could efficiently provide direct esterification of aldehydes under visible light irradiation at room temperature. The use of click reaction as grafting strategy provided covalent attachment of the cobalt complex to support which not only provided higher loading but also precluded the leaching. Furthermore, the presence of carbon nitride support exhibited synergistic effect to enhance the reaction rate. In addition, the milder basic nature of nitrogen containing graphitic support provided efficient ester synthesis without the need for an external base. The synthesized photocatalyst was found to be quite robust which could easily be recovered and reused several times without significantly losing activity.

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Section: Introductionmentioning

confidence: 99%

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C₃N₄) for Visible Light−Assisted Esterification of Aldehydes

Kumar

Pathak

et al. 2017

ChemistrySelect

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“…Low yields and poor selectivity have been the main drawbacks associated with catalytic oxidation reactions. Recently, the selective oxidation of benzyl alcohols to benzaldehyde by using iron oxide-based nanocomposites [17], ionic liquid-modified MIL-100(Fe) [18], developed copper(Ι)/TEMPO catalysts (TEMPO = 2,2,6,6-tetramethylpiperidinyl-N-oxyl) [19,20], photocatalytic oxidation by homogeneous CuCl2 [21], metal-free systems [22], photoactive VO@g-C3N4 [23] and Co oxide nanoparticles [24], among others have been reported.…”

Section: Introductionmentioning

confidence: 99%

Versatile Sulfathiazole-Functionalized Magnetic Nanoparticles as Catalyst in Oxidation and Alkylation Reactions

et al. 2019

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Catalyst design and surface modifications of magnetic nanoparticles have become attractive strategies in order to optimize catalyzed organic reactions for industrial applications. In this work, silica-coated magnetic nanoparticles with a core-shell type structure were prepared. The obtained material was successfully functionalized with sulfathiazole groups, which can enhance its catalytic features. The material was fully characterized, using a multi-technique approach. The catalytic performance of the as-synthesized material was evaluated in 1) the oxidation of benzyl alcohol to benzaldehyde and 2) the microwave-assisted alkylation of toluene with benzyl chloride. Remarkable conversion and selectivity were obtained for both reactions and a clear improvement of the catalytic properties was observed in comparison with unmodified γ-Fe2O3/SiO2 and γ-Fe2O3. Noticeably, the catalyst displayed outstanding magnetic characteristics which facilitated its recovery and reusability.

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“…Although many studies concern the photochemical activity and spectroscopic data analysis of g-C 3 N 4 as well as modification of its surface [19], applications to organic transformations are limited. For example, graphitic C 3 N 4 as well as its surface-doped-materials, catalyze a few reactions; a) photoacetalization of aldehydes/ketones [20] b) the Friedel-Crafts reaction of benzene [21] c) oxidation of alcohols using transition metal doped g-C 3 N 4 [22][23][24][25] d) oxidation of sulfides to sulfoxides using oxidized g-C 3 N 4 (CNO). In addition, selective oxidations of benzylic C-H bonds utilizing mesoporous g-C 3 N 4 with N-OH co catalysts have been reported [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Surface-Doped Graphitic Carbon Nitride Catalyzed Photooxidation of Olefins and Dienes: Chemical Evidence for Electron Transfer and Singlet Oxygen Mechanisms

et al. 2019

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A new photocatalytic reactivity of carbon-nanodot-doped graphitic carbon nitride (CD-C3N4) with alkenes and dienes, has been disclosed. We have shown that CD-C3N4 photosensitizes the oxidation of unsaturated substrates in a variety of solvents according to two competing mechanisms: the energy transfer via singlet oxygen (1O2) and/or the electron transfer via superoxide (O·−2). The singlet oxygen, derived by the CD-C3N4 photosensitized process, reacts with alkenes to form allylic hydroperoxides (ene products) whereas with dienes, endoperoxides. When the electron transfer mechanism operates, cleavage products are formed, derived from the corresponding dioxetanes. Which of the two mechanisms will prevail depends on solvent polarity and the particular substrate. The photocatalyst remains stable under the photooxidation conditions, unlike the most conventional photosensitizers, while the heterogeneous nature of CD-C3N4 overcomes usual solubility problems.

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Selective Oxidation of Alcohols Using Photoactive VO@g-C₃N₄

Abstract: A photoactive VO@g-C 3 N 4 catalyst has been developed for the selective oxidation of alcohols to the corresponding aldehydes and ketones. The visible light mediated activity of the catalyst could be attributed to photoactive graphitic carbon nitrides surface.

Cited by 97 publications

References 32 publications

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C₃N₄) for Visible Light−Assisted Esterification of Aldehydes

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C₃N₄) for Visible Light−Assisted Esterification of Aldehydes

Versatile Sulfathiazole-Functionalized Magnetic Nanoparticles as Catalyst in Oxidation and Alkylation Reactions

Surface-Doped Graphitic Carbon Nitride Catalyzed Photooxidation of Olefins and Dienes: Chemical Evidence for Electron Transfer and Singlet Oxygen Mechanisms

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Selective Oxidation of Alcohols Using Photoactive VO@g-C3N4

Abstract: A photoactive VO@g-C 3 N 4 catalyst has been developed for the selective oxidation of alcohols to the corresponding aldehydes and ketones. The visible light mediated activity of the catalyst could be attributed to photoactive graphitic carbon nitrides surface.

Cited by 97 publications

References 32 publications

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C3N4) for Visible Light−Assisted Esterification of Aldehydes

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C3N4) for Visible Light−Assisted Esterification of Aldehydes

Versatile Sulfathiazole-Functionalized Magnetic Nanoparticles as Catalyst in Oxidation and Alkylation Reactions

Surface-Doped Graphitic Carbon Nitride Catalyzed Photooxidation of Olefins and Dienes: Chemical Evidence for Electron Transfer and Singlet Oxygen Mechanisms

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Selective Oxidation of Alcohols Using Photoactive VO@g-C₃N₄

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C₃N₄) for Visible Light−Assisted Esterification of Aldehydes

Carbon Nitride Grafted Cobalt Complex (Co@npg‐C₃N₄) for Visible Light−Assisted Esterification of Aldehydes