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

Abstract

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.

An experimental and computational study of graphene oxide functionalized with tris(hydroxymethyl)aminomethane as an electrode material for supercapacitors

“…Tris also attacks the carbon of carbonyl as a nucleophile and the electrons of the double bond get a shift to oxygen atom and this electron in return removes the DMAP group, leading to the neutralization of the tris. Figure 1 demonstrates the amide reaction mechanism 26 – 28 .

Figure 1 The amide reaction mechanism of GO@T.

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Study on Oxidative Condensation of Toluene and Hydrazine/Aniline Catalyzed by Copper Complex Immobilized on Functionalized Graphene Oxide

“…By FT-IR spectroscopic analysis, the synthesis of functionalized MCM-41 could be resulted . Parts b and c of Figure indicate the FT-IR spectra of the MCM-41-IL-Cu and MCM-41-IL-CO 2 H-Cu samples.…”

“…Herein, in continuation of our recent research about GO − and to study the effect of both the substrate and CO 2 H functional group in oxidation reaction, Cu-functionalized imidazolium ionic liquid (IL) was synthesized and immobilized on different solid substrates. These compounds include graphene oxide–imidazolium ionic liquid–Cu (GO-IL-Cu), graphene oxide–imidazolium ionic liquid–CO 2 H–Cu (GO-IL-CO 2 H-Cu), MCM-41–imidazolium ionic liquid–Cu (MCM-41-IL-Cu), MCM-41–imidazolium ionic liquid–CO 2 H–Cu (MCM-41-IL-CO 2 H-Cu), chitosan–imidazolium ionic liquid–CO 2 H–Cu (Chit-IL- CO 2 H-Cu), and graphitic carbon nitride–imidazolium ionic liquid–CO 2 H–Cu (g-C 3 N 4 -IL-CO 2 H-Cu).…”

Recyclable Hypervalent Iodine Reagents in Modern Organic Synthesis

“…After recovery, the reduced form can be readily converted into GO-HVI by treatment with peracetic acid. 33 Nemati et al developed a magnetic nanocomposite containing the HVI(III) reagent Fe 3 O 4 -PANI (polyaniline)-I(OAc) 2 (41) as a green, low-cost nanocomposite catalyst with good efficiency. Catalyst 41 was synthesized by the reaction of ferric nitrate nonahydrate (38) and 2-iodoaniline (39) to form 40, followed by oxidation with preheated peracetic acid (Scheme 8).…”