The dependence of high temperature hydrogen activation on the structure of nanofibrous alu mina (filament diameter of 5 nm) was shown. Due to self organization, nanofibers are twisted in spirals and then in a second stage the spirals interlock and form alumina tubes, which then transform into bundles. In the process of hydrogen activation, the specific surface area changes and amorphous alumina nanowires develop into a nanocrystalline phase. TEM investigations showed that high temperature hydrogen activation led to the self organization of the alumina nanofibrous structure into hollow nanotubes with a diameter close to 30 nm.
The electrosynthesis of 1,2,3,4-tetrahydroisoquinoline-1-carbonitriles by acetonitrile reduction is a green and safe strategy to replace the traditional cyanation. Herein, we have obtained the 1,2,3,4-tetrahydroisoquinoline-1-carbonitrile in good yields by a simple reaction between dihydroisoquinolin-2-ium iodide and the electrogenerated acetonitrile formed under low temperature conditions, when a solution of dry acetonitrile is electrolyzed at a Carbon rod as cathode and a magnesium plate as anode in undivided cell.
ChemistrySelectCommunications
Titanosilicalite of the MFI type was obtained by the hydrothermal method. Its initial and annealed at 75oC (TS-1P(75)) and 500oC (TS-1P(500)) forms were studied by X-ray powder diffraction (XRPD), X-ray...
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