Université de Neuchâtel

Aqueous oxidation of alcohols catalyzed by artificial metalloenzymes based on the biotin–avidin technology

Thomas, Christophe M. ; Letondor, Christophe ; Humbert, Nicolas ; Ward, Thomas R.

In: Journal of Organometallic Chemistry, 2005, vol. 690, p. 4488-4491

Based on the incorporation of biotinylated organometallic catalyst precursors within (strept)avidin, we have developed artificial metalloenzymes for the oxidation of secondary alcohols using tert-butylhydroperoxide as oxidizing agent. In the presence of avidin as host protein, the biotinylated aminosulfonamide ruthenium piano stool complex 1 (0.4 mol%) catalyzes the oxidation of...

Consortium of Swiss Academic Libraries

Decomposition in HTPB bonded HMX followed by heat generation rate and chemiluminescence

Käser, F. ; Bohn, M.

In: Journal of Thermal Analysis and Calorimetry, 2009, vol. 96, no. 3, p. 687-695

Université de Neuchâtel

Mono and oligonuclear vanadium complexes as catalysts for alkane oxidation : synthesis, molecular structure, and catalytic potential

Süss-Fink, Georg ; Gonzalez Cuervo, Laura ; Therrien, Bruno ; Stoeckli-Evans, Helen ; Shul’pin, Georgiy B.

In: Inorganica Chimica Acta, 2004, vol. 357, p. 475-484

A series of mono- and oligonuclear vanadium(V) and vanadium(IV) complexes containing various chelating N,O-, N3-, and O2-ligands have been prepared. The biphasic reaction of an aqueous solution of ammonium vanadate and a dichloromethane solution of hexamethylphosphoramide (hmpa) and pyrazine-2-carboxylic acid (pcaH) or pyrazine-2,5-dicarboxylic acid...

Université de Fribourg

Oxidation of sterols: energetics of C–H and O–H bond cleavage

Lengyel, Jozef ; Rimarčík, Ján ; Vagánek, Adam ; Fedor, Juraj ; Lukeš, Vladimír ; Klein, Erik

In: Food Chemistry, 2012, vol. 133, no. 4, p. 1435–1440

Phytosterols, as components of human diet, received much attention because of their cholesterol-lowering and antioxidant properties. We have theoretically studied sterols oxidation in terms of O–H and C–H bond dissociation enthalpies (BDE). In 17 Δ⁵- and Δ⁷-sterols, BDEs were obtained for reported sites of oxidation attack. Obtained results indicate that Δ⁷-sterols are more...