Activation of narrow bandgap photocatalysts is a prerequisite for the efficient production renewable hydrogen from water using sunlight. Loading dual cocatalysts intended to promote reduction and oxidation reactions by photodeposition known greatly enhance splitting activity certain oxide photocatalysts. However, it difficult photodeposit oxygen evolution onto oxynitride because driving forces ...

Enynes connected through aromatic rings are used as substrates for metathesis reactions. The reactivity of three ruthenium carbene complexes is compared. The resulting 1,3-dienes are suitable precursors of polycyclic structures via a Diels-Alder process. Some domino RCM-Diels-Alder reactions are performed, suggesting a possible beneficial effect of the ruthenium catalyst in the cycloaddition pr...

A palladium-pivalic acid cocatalyst system has been developed that exhibits unprecedented reactivity in direct arylation. This reactivity is illustrated with the first examples of high yielding direct metalation-arylation reactions of a completely unactivated arene, benzene. Experimental and computational evidence indicates that the pivalate anion is a key component in the palladation/C-H bond ...

The glycosylation of O-glycosyl trichloroacetimidate donors using a synergistic catalytic system of electron-deficient pyridinium salts/aryl thiourea derivatives at room temperature is demonstrated. The acidity of the adduct formed by the 1,2-addition of alcohol to the electron-deficient pyridinium salt is increased in the presence of an aryl thiourea derivative as an hydrogen-bonding cocatalys...

A series of prototypical Co(II)-based pyridyl bis(imine) complexes {[2(ArN=C(Me))2C5H3N]CoCl2} (Ar = 2,6-C6H3Me2, 2,5-C6H3Me2, 2,4-C6H3Me2, 2,3C6H3Me2) bearing two methyl substituents on each imine aryl group are studied as precatalysts for the homopolymerization of 1,3-butadiene. They showed very high polymerization activities associated with ethylaluminum sesquichloride (EAS) as a cocatalyst....

Readily available chiral primary 1,2-aminoalcohols and diamines have been explored as organocatalysts for a domino Michael-aldol reaction. Their application in this organocascade process afforded cyclohexanone A with high levels of reactivity (up to 91% yield) and stereoselectivity (>97 : 3 d.r., up to 93% ee). Depending on the acid cocatalyst different chiral species (cyclic secondary amines v...

Abstract In this study, we used a hot-pressing process to enhance the photocatalytic properties of TiO 2 /Fe O 3 bimetallic oxide with periodic patterned structure on surface increase photon absorption for photocatalysis in oxygen evolution reaction water splitting. The hot-pressed samples show that combining two metal oxides improves band edge electrode at different wavelengths. obtained using...

The key to developing highly active α-Fe2O3-based photocatalysts is improve the charge separation and efficiently utilize electrons with sufficient thermodynamic energy. Herein, α-Fe2O3 nanosheets (FO) were synthesized using a metal-ion-intervened hydrothermal method then coupled SnO2 (SO) obtain SO/FO nanocomposites. Subsequently, nanosized Ag was selectively loaded on SO photo-deposition resu...