https://pubs.rsc.org/en/content/articlepdf/2019/NP/C8NP00092A

Marine natural products.

Ordered mesoporous NiO-MgO-Al2O3 composite oxides with various Ni and Mg content were facilely synthesized via one pot evaporation induced self-assembly (EISA) strategy. These mesoporous materials with large specific surface areas, big pore volumes, uniform pore sizes and superior thermal stability were investigated as the catalysts for the carbon dioxide reforming of methane reaction. These materials performed high catalytic activity as well as long stability. The improved catalytic performances were suggested to be closely associated with both the amount of laccessibler active centers for the reactants owing to their advantageous structural properties and the stabilized Ni nanoparticles by mesoporous framework matrix due to the lconfinement effectr of the mesopores. Besides, the role of the MgO basic modifier was also studied. It was observed that only moderate amount of the Mg containing (2 M%) could greatly promote the catalytic performances. The stabilized Ni nanoparticles as well as doped MgO had reinforced capacity of resistance to coke, accounting for no deactivation after 100 h long-term stability test at 700 ◦C. Therefore, the ordered mesoporous NiO-MgO-Al2O3 composite oxides promised a series of novel and stable catalyst candidates for carbon dioxide reforming of methane reaction.

Carbon dioxide reforming of methane over ordered mesoporous NiO–MgO–Al2O3 composite oxides

Ordered mesoporous tricompound NiO–CaO–Al2O3 composite oxides with various Ca content were first designed and facilely synthesized via a one-pot, evaporation-induced, self-assembly (EISA) strategy. The obtained mesoporous materials with advantageous textural properties and superior thermal stabilities were investigated as the catalysts for the carbon dioxide reforming of methane reaction. These mesoporous catalysts entirely showed high catalytic activities as well as long catalytic stabilities toward this reaction. The improved catalytic activities were suggested to be closely associated with the advantageous structural properties, such as large specific surface areas; big pore volumes; and uniform pore sizes, which could provide sufficient “accessible” active centers for the gaseous reactants. In addition, the “confinement effect” of the mesoporous matrixes contributed to stabilizing the Ni active sites during the processes of reduction and reaction, accounting for the long lifetime stabilities of these ...

One-Pot Synthesis of Ordered Mesoporous NiO-CaO-Al2O3 Composite Oxides for Catalyzing CO2 Reforming of CH4

Determination of nucleic acids based on the fluorescence quenching of Hoechst 33258 at pH 4.5

Interaction of anticancer drug methotrexate with DNA analyzed by electrochemical and spectroscopic methods.

The reaction of electron-deficient cyclopropane derivatives, cis-1-methoxycarbonyl-2-aryl-6,6-dimethyl-5,7-dioxospiro[2,5]octa-4,8-diones with benzoylmethylenetriphenylarsorane (2) and methoxycarbonylmethylene-triphenylarsorane (4) was found to form cis,trans-1-methoxycarbonyl-2-aryl-3-benzoyl-7,7-dimethyl-6,8-dioxo-spiro[3,5]nona-5,9-dione (3a–3e) and trans, cis,trans-5-[2′-methoxycarbonyl-2′-(triphenylarsoranylidene)acetyl]-6-oxo-3-aryl-tetrahydro-pyran-2,4-dicarboxylic acid dimethyl esters (5a–5c) respectively with high stereoselectivity. The possible reaction mechanisms for the formation of the different products were also proposed.

Xiao-Huaa Sun

Papers

Study on the Reaction of Electron‐deficient Cyclopropane Derivatives with Arsonium Ylides