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  • Organic-inorganic hybrids of imidazole complexes of zinc (II) for catalysts in the glycerolysis of urea.

Organic-inorganic hybrids of imidazole complexes of zinc (II) for catalysts in the glycerolysis of urea.

Journal of nanoscience and nanotechnology (2014-04-18)
Dong-Woo Kim, Dae-Won Park
RESUMO

Bis(alkylimidazole) complexes of zinc, (RIm)2ZnX2, were prepared by a metal insertion reaction. The synthesized (RIm)2ZnX2 exhibited good catalytic performance during synthesis of glycerol carbonate (GC) from glycerol and urea. (HEIm)2ZnCl2 with a hydroxyl group exhibited the highest GC yield during glycerolysis of urea owing to incorporation of acid-base bifunctional active sites. (EIm)2ZnX2 catalysts based on different halide anions showed increased reactivity as Cl- < Br- < I-, which is the order of nucleophilicity. The effects of reaction parameters such as temperature, reaction time, catalyst loading, and degree of vacuum on the reactivity were also investigated.

MATERIAIS
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Sigma-Aldrich
Zinc, sputtering target, diam. × thickness 3.00 in. × 0.125 in., 99.995% trace metals basis
Sigma-Aldrich
Glycerol solution, puriss. p.a., 86-89% (T)
Zinc, foil, 4mm disks, thickness 0.175mm, as rolled, 99.95+%
Zinc, foil, 25mm disks, thickness 0.5mm, as rolled, 99.95+%
Zinc, foil, 2m coil, thickness 0.35mm, as rolled, 99.95+%
Zinc, foil, 5m coil, thickness 0.025mm, as rolled, 99.95+%
Zinc, foil, 4mm disks, thickness 0.5mm, as rolled, 99.99+%
Zinc, foil, 2m coil, thickness 0.1mm, as rolled, 99.95+%
Zinc, foil, 50mm disks, thickness 0.5mm, as rolled, 99.99+%
Zinc, foil, 4mm disks, thickness 0.05mm, as rolled, 99.95+%
Zinc, foil, 4mm disks, thickness 0.25mm, as rolled, 99.99+%
Zinc, foil, 2m coil, thickness 0.025mm, as rolled, 99.95+%
Zinc, foil, 5m coil, thickness 0.05mm, as rolled, 99.95+%
Zinc, foil, 25mm disks, thickness 0.5mm, as rolled, 99.99+%
Zinc, foil, 50mm disks, thickness 1.0mm, as rolled, 99.95+%
Zinc, foil, 4mm disks, thickness 0.05mm, as rolled, 99.99+%
Zinc, foil, 2m coil, thickness 0.05mm, as rolled, 99.95+%
Zinc, foil, 6mm disks, thickness 0.5mm, as rolled, 99.99+%
Zinc, foil, 8mm disks, thickness 1.0mm, as rolled, 99.95+%
Zinc, foil, 6mm disks, thickness 0.125mm, as rolled, 99.99+%
Zinc, foil, light tested, 25x25mm, thickness 0.025mm, as rolled, 99.99+%
Zinc, foil, 8mm disks, thickness 0.15mm, as rolled, 99.95+%
Zinc, foil, 2m coil, thickness 0.5mm, as rolled, 99.95+%
Sigma-Aldrich
Zinc, shot, 99.9999%
Sigma-Aldrich
Glycerin, meets USP testing specifications
Sigma-Aldrich
Imidazole hydrochloride
Sigma-Aldrich
Imidazole, ACS reagent, ≥99% (titration)
Sigma-Aldrich
Imidazole, ≥99% (titration), crystalline
Sigma-Aldrich
Imidazole sodium derivative, technical grade
Sigma-Aldrich
Zinc, granular, 20-30 mesh, ACS reagent, ≥99.8%