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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
PMID24738441
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
Número do produto
Marca
Descrição do produto
749060
Sigma-Aldrich
Zinc, sputtering target, diam. × thickness 3.00 in. × 0.125 in., 99.995% trace metals basis
49782
Sigma-Aldrich
Glycerol solution, puriss. p.a., 86-89% (T)
GF69714007
Zinc, foil, 4mm disks, thickness 0.175mm, as rolled, 99.95+%
GF45815238
Zinc, foil, 25mm disks, thickness 0.5mm, as rolled, 99.95+%
GF22469137
Zinc, foil, 2m coil, thickness 0.35mm, as rolled, 99.95+%
GF46864200
Zinc, foil, 5m coil, thickness 0.025mm, as rolled, 99.95+%
GF37353225
Zinc, foil, 4mm disks, thickness 0.5mm, as rolled, 99.99+%
GF14966006
Zinc, foil, 2m coil, thickness 0.1mm, as rolled, 99.95+%
GF45937794
Zinc, foil, 50mm disks, thickness 0.5mm, as rolled, 99.99+%
GF18973558
Zinc, foil, 4mm disks, thickness 0.05mm, as rolled, 99.95+%
GF87668421
Zinc, foil, 4mm disks, thickness 0.25mm, as rolled, 99.99+%
GF51234241
Zinc, foil, 2m coil, thickness 0.025mm, as rolled, 99.95+%
GF49751781
Zinc, foil, 5m coil, thickness 0.05mm, as rolled, 99.95+%
GF89967504
Zinc, foil, 25mm disks, thickness 0.5mm, as rolled, 99.99+%
GF97942854
Zinc, foil, 50mm disks, thickness 1.0mm, as rolled, 99.95+%
GF50337615
Zinc, foil, 4mm disks, thickness 0.05mm, as rolled, 99.99+%
GF30798018
Zinc, foil, 2m coil, thickness 0.05mm, as rolled, 99.95+%
GF69153138
Zinc, foil, 6mm disks, thickness 0.5mm, as rolled, 99.99+%
GF40416599
Zinc, foil, 8mm disks, thickness 1.0mm, as rolled, 99.95+%
GF36646768
Zinc, foil, 6mm disks, thickness 0.125mm, as rolled, 99.99+%
GF92544239
Zinc, foil, light tested, 25x25mm, thickness 0.025mm, as rolled, 99.99+%
GF42897886
Zinc, foil, 8mm disks, thickness 0.15mm, as rolled, 99.95+%
GF90399190
Zinc, foil, 2m coil, thickness 0.5mm, as rolled, 99.95+%
716723
Sigma-Aldrich
Zinc, shot, 99.9999%
G2289
Sigma-Aldrich
Glycerin, meets USP testing specifications
I3386
Sigma-Aldrich
Imidazole hydrochloride
I2399
Sigma-Aldrich
Imidazole, ACS reagent, ≥99% (titration)
I0250
Sigma-Aldrich
Imidazole, ≥99% (titration), crystalline
197637
Sigma-Aldrich
Imidazole sodium derivative, technical grade
243469
Sigma-Aldrich
Zinc, granular, 20-30 mesh, ACS reagent, ≥99.8%