Dimetal hepta- and octaalkoxide anions of molybdenum and tungsten... Discusses the binding of alkoxide anions to the M2(OR)6 center. Structural types of complexes for d3-d3 dimers and attendant chemistry; Synthesis; Bonding ... Budzichowski,A T.,Chisholm,... - 《Journal of the American ...
Additional analyses of the O K-edge using model samples containing carbamate, carbonate, and bicarbonate functional groups as reference demonstrate a carbamate bonding mechanism for the chemical adsorption of CO2 by the HAS material under the conditions employed. These findings show the capability of ...
Tetraalkylureas, tetraalkyloxalamines, or tetraalkylketomalonamides can be obtained in good yield by the same general procedure, followed by treatment of the reaction mixture with oxygen after the carbon monoxide absorption has ceased and before the regular workup. 展开 ...
The oxidative coupling of xanthene and other activated benzylic compounds with carbon nucleophiles such as ketones, can be performed under ambient conditions without solvent by simply using oxygen and catalytic amounts of methanesulfonic acid. The proposed reaction mechanism involves substrate activation by...
(Kurban et al.2010). However, as discussed above, the hyperbranched, oxygen-rich, and complex network of lignin restricts the order rearrangement of the carbon layer in the carbonization process, making it difficult for the production of highly graphitized carbon materials from lignin (Torres-Canas...
These include: the donor-acceptor mechanism; the water adsorption effect; and the effect of oxygen groups on van der Waals interactions. In this work, the significance of H-bonding between the surface oxygen and aromatic adsorbates has been reported. 展开 ...
Compared with the aromatic substrates, the C-H bonds in aliphatic substrates have higher bonding energy and stability, making their activation challenging. For the conventional liquid-phase oxidation of aliphatic alkanes with molecular oxygen, the successful catalysts display relative low product yields (...
Also, the adsorption mechanism is depended on the action due to π–π stacking interaction and hydrogen bonding. The smaller size of IBP molecules in comparison with the pore size of carbon aerogel also contribute to the pre-filling mechanism of sorption (Abolhasani et al., 2019). Carbon ...
Oxygen-containing carbons are promising supports and metal-free catalysts for many reactions. However, distinguishing the role of various oxygen functional groups and quantifying and tuning each functionality is still difficult. Here we investigate the r
X-ray photoelectron spectroscopy (XPS) measurements were performed to elucidate the bonding states of carbon and nitrogen in different CDs upon varying the BPEI concentration. As XPS probes only the surface layers of the sample, argon ion sputtering was additionally applied for 15 min to provide...