Finely Tunable Carbon Nanofiber Catalysts for the Efficient Production of HMF in Biphasic MIBK/HO Systems.

This work proposes catalytic systems for fructose dehydration to 5-hydroxymethylfurfural using a series of functionalized carbon nanofibers. The catalysts were synthesized via finely selected covalent grafting in order to include a variety of functionalities like pure Bronsted acid, tandem Brønsted/Lewis acid, and tandem Lewis acid/Lewis base catalysts. After the characterization and evaluation of acidity strength and the amount of acid centers, the catalyst series was screened and related to the product distribution.

Nitrous oxide activation by picoline-derived Ni-CNP hydrides.

Oxygen atom transfer (OAT) from NO to the Ni-H bond of proton-responsive picoline-derived CNP nickel complexes has been investigated both experimentally and theoretically. These Ni-CNP complexes efficiently catalyse the reduction of NO with pinacolborane (HBpin) under mild conditions.

Ruthenium nanoparticles stabilized by 1,2,3-triazolylidene ligands in the hydrogen isotope exchange of E-H bonds (E = B, Si, Ge, Sn) using deuterium gas.

A series of ruthenium nanoparticles (Ru·MIC) stabilized with different mesoionic 1,2,3-triazolylidene (MIC) ligands were prepared by decomposition of the Ru(COD)(COT) (COD = 1,5-cyclooctadiene; COT = 1,3,5-cyclooctatriene) precursor with H (3 bar) in the presence of substoichiometric amounts of the stabilizer (0.1-0.2 equiv.

Catalytic Nitrous Oxide Reduction with H Mediated by Pincer Ir Complexes.

Reduction of nitrous oxide (NO) with H to N and water is an attractive process for the decomposition of this greenhouse gas to environmentally benign species. Herein, a series of iridium complexes based on proton-responsive pincer ligands (-) are shown to catalyze the hydrogenation of NO under mild conditions (2 bar H/NO (1:1), 30 °C). Among the tested catalysts, the Ir complex , based on a lutidine-derived CNP pincer ligand having nonequivalent phosphine and N-heterocyclic carbene (NHC) side donors, gave rise to the highest catalytic activity (turnover frequency (TOF) = 11.

Reduction of NO with hydrosilanes catalysed by RuSNS nanoparticles.

A series of RuSNS nanoparticles, prepared by decomposition of Ru(COD)(COT) with H in the presence of an SNS ligand, have been found to catalyse the reduction of the greenhouse gas NO to N employing different hydrosilanes.