The most striking aspect of the high pressure behaviour of carbon is its tendency to rehybridize from sp or sp2 bonding towards sp3 bonding. Rehybridization of graphite under high-pressure–high–temperature conditions is well–known and exploited in the commercial synthesis of diamond abrasives. ...
sp2- and sp3-hybridized carbon materials as catalysts for aerobic oxidation of cyclohexane [J]. Catalysis Science & Technology, 2013, 3:2654-2660.Cao, Y.; Luo, X.; Yu, H.; Peng, F.; Wang, H.; Ning, G. sp2- and sp3-hybridized carbon materials as catalysts for aerobic oxidation of...
Carbon, sp2‐hybridizedCarbon, sp3‐hybridizedLithographyPatterning, laser‐inducedA new method of laser-induced lithography for direct writing of carbon on a glass surface is described, in which deposition occurs from a transparent precursor solution. At the glass–solution interface where the laser ...
The largest influence on parameter D and then evaluated C sp2/sp3 content resulted from oxygen and hydrogen at the surface and applied smoothing procedure in contrary to structural properties of carbon nanomaterials (crystallinity, grain size). Values of parameter D for C sp3 and C sp2 ...
Using a combined experimental and theoretical approach, we address C 1s core-level shifts in amorphous carbon. Experimental results are obtained by x-ray photoelectron spectroscopy (XPS) and electron-energy-loss spectroscopy (EELS) on thin-film samples of different atomic density, obtained by a puls...
In general, sp3-C containing boron-doped diamond (BDD) and amorphous carbon (a-C) electrodes offer greater stability to corrosion than pure sp2 carbon materials [[7], [8], [9], [10]]. The sp2/sp3 ratio governs the chemical and physical characteristics of the carbon electrodes. In ...
Carbon has a variety of structural allotropes due to its ability of different hybridizations1. It is well known that there exist three carbon allotropes in natural materials, that is, graphite, diamond, and amorphous carbon, con- taining the sp2, sp3, and mixed sp2/sp3 hybridized carbon ...
A new carbon porous allotrope is investigated by the first principle calculations. The allotrope consists of 12 atoms in a tetragonal cell and displays a symmetry (termed as tP?C12 carbon) with a mass density of 2.18?g/cm3. Its phonon dispersion possessing no imaginary frequency indicates that ...
Given the chain-length effect on macrocyclization35,36, we exam- ined the chain- and arm-length effect of substrates on the yield and diastereoselectivity of Csp2-Csp3 gridization under optimized condi- tions (Fig. 2c). As the chain-length of substituents at 4-position of phenyl (1a, 1...
Nitrogen heterocycle represents a ubiquitous skeleton in natural products and drugs. Late-stage C(sp3)-H bond functionalization of N-heterocycles with broad substrate scope remains a challenge and of particular significance to modern chemical synthesis a