Current Catalysis - Volume 2, Issue 1, 2013

When the yield of a heterogeneously photocatalyzed reaction is seen to pass through maximum as the mass of catalyst is increased in a suspension, this behavior may be attributable to a regime in which back-reflection most often occurs after a single photon-particle encounter, while absorption requires multiple internal reflections. This was modeled with a double exponential equation, which predicts that the yield will Read More

The Cu-Fe mixed oxide catalysts with different Cu:Fe mass ratios were prepared by a solution technique. The catalysts were characterized by Ar physisorption, PXRD, TPD-MS, SEM-EDX and were tested for the CO-PROX reaction. According to PXRD and SEM-EDX microanalysis data, the active Cu-Fe mixed oxide catalysts, where the Cu:Fe mass ratio ranges from 1:1 to 1:5.67, contain the delafossite CuFeO2 phase, which is form Read More

Novel monotosylated ethylenediamine was synthesized from ethylenediamine and its application to ruthenium(II)-transfer hydrogenation of aldehydes in water is described. The transfer hydrogenation reaction could afford excellent conversion rates (up to 100%).

The increase in the global contamination of freshwater systems with industrial and natural chemical compounds is one of the key problems facing the world today. We report a simple fabrication strategy for hierarchical mesoporous NiO nanocrystals (NCs) with sheet-like morphologies using the hydrothermal method. This fabrication strategy introduces the controlled synthesis of scalable and high-yield mesoporous NiO nanoshee Read More

Palladium supported TiO2 catalysts (2 %wt. of Pd) were prepared by different methods and studied in the gas phase reaction of partial oxidation of methanol. A comparative study of classical methods of preparation with those prepared in liquid phase was done. The catalysts were characterized by different methods such as: ICP, XRD, XPS, H2- chemisorption, N2-physisorption and TEM. The results showed that the preparation me Read More

A systematic optimization study of reaction conditions of alkyne hydration, catalyzed by mercury(II) ptoluensulfonamidate is described. Hydration takes place under catalytic conditions by using from 0.01 to 0.2 equivalents of the easily available and inexpensive mercury(II) p-toluensulfonamidate in a hydroalcoholic solution, under mild and neutral conditions. Different reaction parameters like temperature, con Read More

Zn(II) and Co(II) organometallic complexes I and II involving 1,2-ethylenediamine were first synthesized from the reaction of the ligand 1,2-ethylenediamine with Zn(OAc)2· 2H2O and Co(OAc)2·4H2O in ethanol, then they were used to catalyze the Henry reaction, and good catalytic results (64-99%) were achieved.

We investigated an efficient production of ethyl esters (biodiesel) by enzymatic transesterification of triolein. This triacylglyceride was synthesized from oleic acid and glycerol by acid catalysis and then subjected to enzymatic transesterification by Candida antarctica lipase. This biocatalytic process afforded high yields of biodiesel (93% by 1H NMR, 90.4% by GC, 24 h, at 32 °C) which were dependent on reaction time. The yiel Read More

Catalytic hydroamination of terminal alkynes with amines is the most attractive C-N bond forming method. Intermolecular hydroamination of terminal alkynes with aromatic amine has been carried out using Cu- exchanged SiO2/Al2O3 as a heterogeneous catalyst. SiO2/Al2O3 with Si/Al ratio 12.5 has been prepared by novel sol-gel method using tetraethyl orthosilicate and aluminium sec-butoxide as Si and Al precursors Read More

A simple, efficient and ecofriendly protocol for the synthesis of pyrazoles and β-enaminones using halogen free Bronsted acidic ionic liquid N-methyl-2-pyrrolidone hydrogen sulfate as a reusable catalyst has been developed. The prepared ionic liquids were characterized by different techniques like NMR and their Bronsted acidity was measured using infrared spectroscopy using pyridine as a probe molecule and monit Read More