Copper(II)-catalyzed reactions of activated aromatics

Selective electro-oxidation of phenol to 1,4-hydroquinone employing carbonaceous electrodes: surface modification is the key

The oxidation of phenol to 1,4-hydroquinone with high conversion, remarkable selectivity and an excellent yield (87% isolated) has been accomplished under electrolytic conditions in an aqueous medium with surface modified carbon-based electrodes.

Water mediated proton conductance in a hydrogen-bonded Ni(ii)-bipyridine-glycoluril chloride self-assembled framework

Proton conducting properties have been investigated in a new Ni(ii)-based hydrogen-bonded porous framework synthesized using bipyridine-glycoluril (BPG) tecton.

Highly transparent and flexible polyaniline mesh sensor for chemiresistive sensing of ammonia gas

A new solution to flexible transparent polyaniline sensors by introducing hierarchical structures with regular micro meshes and solution-processed fabrication.

A Kinetic Study of Phenol Oxidation with H2O2 Catalysed by Crowned Schiff Base Mn(Iii) Complexes in Micellar Media

Comparison is made of the kinetics of oxidations of phenol with H2O2 catalysed by two Schiff base manganese(III) complexes in micellar media using cationic surfactant cetyl trimethylammonium bromide (CTAB) and nonionic surfactant polyoxyethylene lauryl ether (Brij35). The characteristic spectra of the two Schiff base complexes in H2O2-buffered solution were recorded and analysed. Both Schiff base manganese(III) complexes exhibited remarkable catalytic activity for phenol oxidation by H2O2 under different conditions.

A mild, copper catalyzed route to conducting polyaniline

The aniline dimer, N-(4-aminophenyl)aniline has been polymerized cleanly under mild conditions to obtain an emeraldine base form of polyaniline using [MeB(3-(Mes)Pz)3]CuCl as the catalyst and H2O2 as the oxidant, while the subsequent acidification of the emeraldine base gives the conducting emeraldine salt form of polyaniline.

Study on phenol oxidation with H2O2

Two new ligands, 1-hydroxy-5- 4-(2-hydroxybenzylideneamino)pheno - xy -3-oxapentane (HL1) and 1-methoxy-5- 4-(2-hydroxybenzylideneamino)pheno - xy -3-oxapentane (HL2), and their Mn(III) complexes were synthesized and characterized. The two new Schiff base Mn(III) complexes were used to mimic peroxidase in the oxidation of phenol by hydrogen peroxide. The effect of the mole ratio of H2O2 to the complex, pH and temperature on the reaction rate was investigated. The mechanism of the catalytic oxidation is discussed. A kinetic mathematic model for the oxidation of phenol catalyzed by Schiff base Mn(III) complexes has been constructed.

Synthesis of cyclic peptides by ring-closing metathesis

The synthesis of a series of "amide to amide" cyclized peptides by ring-closing metathesis (RCM) as well as a convenient synthesis for the linear precursors is described. In addition, the influence of the length of the alkene substituents and the influence of the peptide sequence is investigated, leading to a set of general rules to obtain "amide to amide" cyclized peptides by RCM.