Nanoscale graphene oxide sheets as highly efficient carbocatalysts in green oxidation of benzylic alcohols and aromatic aldehydes

Sedrpoushan, Alireza; Heidari, Masoud; Akhavan, Omid

doi:10.1016/s1872-2067(17)62776-1

Cited by 24 publications

(10 citation statements)

References 79 publications

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“…The low yield for benzyl alcohol oxidation in the absence of NGO proved that NGO served as a good catalyst. 118 GO is a simple and efficient catalyst for aza-Michael addition of amines and electron-deficient olefins. These reactions proceed under mild circumstances and produce high yields in shorter durations (Scheme 27).…”

Section: T H I S C O N T E N T Imentioning

confidence: 99%

An Update on Graphene Oxide: Applications and Toxicity

et al. 2022

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Graphene oxide (GO) has attracted much attention in the past few years because of its interesting and promising electrical, thermal, mechanical, and structural properties. These properties can be altered, as GO can be readily functionalized. Brodie synthesized the GO in 1859 by reacting graphite with KClO 3 in the presence of fuming HNO 3 ; the reaction took 3−4 days to complete at 333 K. Since then, various schemes have been developed to reduce the reaction time, increase the yield, and minimize the release of toxic byproducts (NO 2 and N 2 O 4 ). The modified Hummers method has been widely accepted to produce GO in bulk. Due to its versatile characteristics, GO has a wide range of applications in different fields like tissue engineering, photocatalysis, catalysis, and biomedical applications. Its porous structure is considered appropriate for tissue and organ regeneration. Various branches of tissue engineering are being extensively explored, such as bone, neural, dentistry, cartilage, and skin tissue engineering. The band gap of GO can be easily tuned, and therefore it has a wide range of photocatalytic applications as well: the degradation of organic contaminants, hydrogen generation, and CO 2 reduction, etc. GO could be a potential nanocarrier in drug delivery systems, gene delivery, biological sensing, and antibacterial nanocomposites due to its large surface area and high density, as it is highly functionalized with oxygen-containing functional groups. GO or its composites are found to be toxic to various biological species and as also discussed in this review. It has been observed that superoxide dismutase (SOD) and reactive oxygen species (ROS) levels gradually increase over a period after GO is introduced in the biological systems. Hence, GO at specific concentrations is toxic for various species like earthworms, Chironomus riparius, Zebrafish, etc.

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Section: T H I S C O N T E N T Imentioning

confidence: 99%

An Update on Graphene Oxide: Applications and Toxicity

et al. 2022

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“…Due to the previous literatures and also our research which was discussed above, in oxidation process by GO‐HVI, all of GO,‐ HVI and oxygen act as active components and can oxidize alcohol, so all these three parts play key roles in this procedure and they do not have separate roles in oxidation. So, it cannot show the actual mechanism of oxidation with participation of GO, HVI and oxygen in one ordinary scheme.…”

Section: Introductionmentioning

confidence: 90%

Graphene Oxide‐Supported Hypervalent Organoiodine (III): Recyclable Reagent for Selective and Metal‐Free Oxidation of Alcohols

2018

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In this research, main emphasis has been placed on the oxidizing properties of graphene oxide (GO) and hypervalent organoiodine (III) (HVI) and their oxidizing effect in GO-HVI. GO-HVI as a metal-free, environment-friendly, recyclable and efficient heterogeneous reagent was synthesized and completely characterized by Fourier transform infrared spectroscopy (FT-IR), energy dispersive X-ray (EDX), field emission scanning electron microscopy (FE-SEM), X-ray diffraction, and atomic force microscopy (AFM). The synthesized GO-HVI was used to achieve an effective and selective method for oxidation of various alcohols. All substituted alcohols were oxidized in good to excellent yields under mild conditions at room temperature. The oxidizing ability of GO-HVI was higher in comparison with starting GO and HVI. This GO-HVI have great stability and could be recycled six times without noteworthy loss of activity.

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“…Aromatic alcohol oxidation has been one of the most widely used reactions in organic chemistry. [1][2][3] 1-Phenylethanol has the typical monomer structure of a secondary aromatic alcohol in the lignin structure and its efficient oxidation to acetophenone is the research goal of many scholars. 4,5 By oxidizing the secondary alcohol hydroxyl group in the lignin b-O-4 linkage to the corresponding ketocarbonyl group, the bond energy of the lignin b-O-4 bond can be effectively reduced and the depolymerization of lignin can be accelerated.…”

Section: Introductionmentioning

confidence: 99%