Direkt zum Inhalt

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

ZUSAMMENFASSUNG

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.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

Sigma-Aldrich

Glycerin, ACS reagent, ≥99.5%

Sigma-Aldrich

Glycerin, Molecular Biology, ≥99.0%

Sigma-Aldrich

Glycerin, ReagentPlus^®, ≥99.0% (GC)

Sigma-Aldrich

Imidazol, ReagentPlus^®, 99%

Sigma-Aldrich

Harnstoff, powder, BioReagent, Molecular Biology, suitable for cell culture

Sigma-Aldrich

Imidazol, ACS reagent, ≥99% (titration)

Sigma-Aldrich

Harnstoff, ACS reagent, 99.0-100.5%

Sigma-Aldrich

Glycerin, ≥99.5%

Sigma-Aldrich

Zink, dust, <10 μm, ≥98%

Sigma-Aldrich

Glycerin -Lösung, 83.5-89.5% (T)

Sigma-Aldrich

Imidazol, Molecular Biology, ≥99% (titration)

Supelco

Harnstoff, 8 M (after reconstitution with 16 mL high purity water)

Sigma-Aldrich

Glycerin, BioReagent, suitable for cell culture, suitable for insect cell culture, suitable for electrophoresis, ≥99% (GC)

Sigma-Aldrich

Glycerin, BioUltra, Molecular Biology, anhydrous, ≥99.5% (GC)

Sigma-Aldrich

Harnstoff -Lösung, BioUltra, ~8 M in H₂O

Supelco

Glycerin, Pharmaceutical Secondary Standard; Certified Reference Material

Sigma-Aldrich

Imidazol, BioUltra, ≥99.5% (GC)

Sigma-Aldrich

Zink, granular, 20-30 mesh, ACS reagent, ≥99.8%

Sigma-Aldrich

Glycerin, BioXtra, ≥99% (GC)

Sigma-Aldrich

Zink, powder, <150 μm, 99.995% trace metals basis

Sigma-Aldrich

Imidazol-Pufferlösung, BioUltra, 1 M in H₂O

Sigma-Aldrich

Harnstoff, ReagentPlus^®, ≥99.5%, pellets

Sigma-Aldrich

Harnstoff, BioUltra, Molecular Biology, 99% (T)

Sigma-Aldrich

Imidazol, puriss. p.a., ≥99.5% (GC)

Sigma-Aldrich

Harnstoff, BioXtra, pH 7.5-9.5 (20 °C, 5 M in H₂O)

Sigma-Aldrich

Glycerin, FCC, FG

Sigma-Aldrich

Glycerin, meets USP testing specifications

Sigma-Aldrich

Harnstoff, suitable for electrophoresis

Sigma-Aldrich

Zink, foil, thickness 0.25 mm, 99.9% trace metals basis

Sigma-Aldrich

Zink, nanopowder, 40-60 nm avg. part. size, ≥99% trace metals basis