A straightforward implementation of in situ solution electrochemical <sup>13</sup>C NMR spectroscopy for studying reactions on commercial electrocatalysts: ethanol oxidation
作者:L. Huang、E. G. Sorte、S.-G. Sun、Y. Y. J. Tong
DOI:10.1039/c5cc00862j
日期:——
The first in situ solution electrochemical 13C NMR study of ethanol oxidation on commercial Pt/C and PtRu/C was reported.
首次报道了商用Pt/C和PtRu/C上乙醇氧化的原位溶液电化学13C NMR研究。
Aldehyde Binding through Reversible C–C Coupling with the Pincer Ligand upon Alcohol Dehydrogenation by a PNP–Ruthenium Catalyst
作者:Michael Montag、Jing Zhang、David Milstein
DOI:10.1021/ja303121v
日期:2012.6.27
Primaryalcoholdehydrogenation by a PNP-Ru(II) catalyst was probed by low-temperature NMR experiments. Facile dehydrogenation occurred at -30 °C, but the resulting aldehydes were not found in solution, as they were trapped by the catalyst through a new mode of metal-ligand cooperation involving Ru-O coordination and an unusual, highly reversible C-C coupling with the PNP pincer ligand.
通过低温核磁共振实验探测了 PNP-Ru(II) 催化剂的伯醇脱氢。在 -30 °C 时发生了轻松的脱氢反应,但在溶液中未发现生成的醛,因为它们通过涉及 Ru-O 配位的新金属-配体合作模式和不寻常的、高度可逆的 CC 偶联被催化剂捕获。 PNP钳状配体。
Conformational Dynamics and Exchange Kinetics of <i>N</i>-Formyl and <i>N</i>-Acetyl Groups Substituting 3-Amino-3,6-dideoxy-α-<scp>d</scp>-galactopyranose, a Sugar Found in Bacterial O-Antigen Polysaccharides
cis–trans isomerization of the θ2 torsion angle, centered at the amide bond, was also investigated by employing 1H NMRlineshapeanalysis and 13C NMR saturation transfer experiments. The extracted transition rate constants were utilized to calculate transition energy barriers that were found to be about 20 kcal·mol–1 in both DMSO-d6 and D2O. Enthalpy had a higher contribution to the energy barriers
Partial Oxidation of Ethane to Oxygenates Using Fe- and Cu-Containing ZSM-5
作者:Michael M. Forde、Robert D. Armstrong、Ceri Hammond、Qian He、Robert L. Jenkins、Simon A. Kondrat、Nikolaos Dimitratos、Jose Antonio Lopez-Sanchez、Stuart H. Taylor、David Willock、Christopher J. Kiely、Graham John Hutchings
DOI:10.1021/ja403060n
日期:2013.7.31
are effective for the partialoxidation of ethane with hydrogen peroxide giving combined oxygenate selectivities and productivities of up to 95.2% and 65 mol kgcat(-1) h(-1), respectively. High conversion of ethane (ca. 56%) to acetic acid (ca. 70% selectivity) can be observed. Detailed studies of this catalytic system reveal a complex reaction network in which the oxidation of ethane gives a range