The catalytic oxidation of hydroquinone: influence of surface properties of polymeric catalysts with aminoguanidyl ligand on catalytic properties

Copper(II)–imida‐salen Complexes Encapsulated into NaY Zeolite for Oxidations Reactions

“…[1,[60][61][62][63] The catalysts evaluated in this study also show high catalytic activity in this reaction ( Table 7). Both heterogeneous catalysts show similar substrate conversion and this is in accord with literature data, [62] which suggest that four-coordinate Cu II complexes of the N 2 O 2 type show the highest catalytic activity in the oxidation of hydroquinone. Benzoquinone is the main oxidation product with a selectivity always higher than 80 %.…”

Polymeric supports with amino groups from halogenoacetylated styrene/divinylbenzene copolymers

“…Our earlier investigation indicated that only catalysts with aminoguanidyl ligand obtained in direct aminolysis of nitrile groups in acrylonitrile copolymers with aminoguanidine salts showed the highest activity and selectivity (about 100%) [13,[25][26][27]. It results from possible formation of N 2 O 2 complexes with two amino and two carboxyl groups around Cu(II) plane.…”

“…We have published that supports with aminoguanidyl groups after Cu(II) ions sorption were better oxidation catalysts than supports with others amino groups [13,[25][26][27]. Their catalytic activity was tested in two model reaction of hydroquinone (H 2 Q) to p-benzoquinone (Q) or 2,5-di-tertbutylhydroquinone (DTBH 2 Q) to 2,5-di-tert-butylbenzoquinone (DTBQ) oxidation using hydrogen peroxide (Scheme 3).…”

Synthesis, characterization and properties of nitrogen-rich salts of trinitrophloroglucinol

“…Ammonia, aminoguanidine (AG), carbohydrazide (CHZ), semicarbazide (SCZ) and 5-aminotetrazo (ATZ, Chart 1) are widely used in medicines, pesticides, fine chemicals, and energetic materials [9][10][11][12][13]. In the field of energetic materials, they have received much attention since they possess such advantages as higher nitrogen content, higher enthalpy, and lower sensitivity.…”