The present study reports the synthesis of amine functionalised Graphene Oxide by two different methods, one by a modified Bucherer reaction and the other by using dodecyl amine. The synthesised ...amine functionalised Graphene oxide by modified Bucherer reaction (AGO) and by using dodecyl amine (DGO) was characterised by Fourier transform infra-red spectroscopy (FTIR), X-ray diffraction analysis (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), and Raman spectroscopy. A series of natural rubber (NR)-AGO and NR-DGO nanocomposites with varying compositions of AGO and DGO were prepared by the latex mixing method. The morphological, mechanical, and dielectric properties of the nanocomposites were analysed by SEM, TEM, universal testing machine (UTM), and impedance analyser. The results obtained for NR-AGO and NR-DGO nanocomposites revealed enhancement in mechanical and dielectric properties from neat NR and NR-Graphene Oxide (GO) nanocomposites. The tensile strength of NR has been improved by almost 70%, tensile modulus (300% elongation) by 85%, and tear strength by 67% on the addition of 0.5 phr of AGO and by the addition of 0.5 phr DGO, the tensile strength of NR has been improved by 74%, tensile modulus (300% elongation) by 87% and tear strength by 73%.
We have synthesized amino functionalized reduced graphene oxide (NH
2
-rGO) composite. Bucherer reaction was used for the in situ modification of graphene oxide into the (NH
2
-rGO). A simple ...hydrothermal method was utilized for proposed synthesis. Electrochemical sensor was fabricated by drop coating NH
2
-rGO nanocomposite onto the glassy carbon electrode (GCE) for individual and the simultaneous detection of dopamine (DA) and uric acid (UA). The NH
2
-rGO materials formation was confirmed by X-ray diffraction, IR, UV and FE-SEM. The electrochemical sensing of DA and UA was examined by cyclic voltammetry and differential pulse voltammetry. For individual detection of DA, the linear responses of current concentration plot was found in the concentration range of 2.04 × 10
−4
– 2.04 × 10
−3
M with detection limit 1.4 × 10
−4
M (S/N = 3) and for UA, 1.8 × 10
−3
– 1.8 × 10
−4
M with detection limit 1.67 × 10
−4
M (S/N = 3). The NH
2
-rGO/GCE electrochemical sensor further tested for the simultaneous detection of binary mixtures of DA and UA and found to be high sensitive compared to individual detection of DA and UA at pH 3. Sensor selectivity is demonstrated in the presence of 2 × 10
−4
M concentrations of potentially active interfering compounds including dopamine, uric acid and glucose isomers.
The Bucherer reaction is a common pathway for the conversion of 1‐ and 2‐naphthols into the corresponding 1‐ or 2‐naphthylamines, respectively. Mostly, only singular examples for its preparative use ...are reported since this particular transformation seems to be very sensitive to the reaction conditions. By choosing different phenolic substrates and chiral amines, we were able to prepare a broad scope of optically pure arylamines using this type of reaction. In contrast to alternative methods forming C−N aryl bonds such as Buchwald‐Hartwig or Chan‐Lam cross‐coupling reactions, no palladium or copper catalysts are required. The use of water as solvent and the easily available starting materials make this method to an attractive approach.
Using the Bucherer reaction to synthesize optically pure arylamine derivatives depicts an elegant alternative to transition‐metal or copper‐catalyzed reactions. We prepared 15 arylamine derivatives using this reaction. The desired products can be obtained in yields up to 70 %.
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