Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Caesium hydroxide"'
Publikováno v:
Angewandte Chemie (International Ed. in English)
Herein we report a versatile concept for the synthesis of fourfold functionalized, soluble pyrenes, peropyrenes, terropyrenes, and quarterropyrenes. They were obtained by a modular stepwise approach towards the rylene scaffold via Suzuki–Miyaura cr
Publikováno v:
Applied Catalysis A: General. 510:189-195
We herein present an easy approach to increase drastically the catalytic activity of Ru/γ-Al2O3 catalysts in ammonia decomposition by surface modification with alkali hydroxides. The best activities have been achieved by a catalyst modification with
Autor:
Joaquín C. García-Martínez, A. de Lucas, Juan F. Rodríguez, María Jesús Ramos, María M. Velencoso
Publikováno v:
Journal of Macromolecular Science, Part A. 50:905-913
The employment of glycerol phosphate as initiator for the synthesis of polyether polyols is explored in order to open the possibility of preparing a new range of products with enhanced flame retardant properties. For this purpose, glycerol phosphate
Autor:
María Jesús Ramos, C. Gutiérrez, Juan F. Rodríguez, María M. Velencoso, A. de Lucas, Joaquín C. García-Martínez
Publikováno v:
Journal of Macromolecular Science, Part A. 48:569-576
The synthesis of bifunctional polyols using glycerol phosphate calcium salt hydrate as initiator and caesium hydroxide and potassium tert-butoxide as catalyst by means of anionic polymerization was achieved. If a phosphate salt is used as initiator,
Publikováno v:
Tetrahedron. 62:8152-8157
An efficient synthesis is reported for 4,5-dibromo-[1,3]dithiole-2-thione (1) and 4-bromo-1,3-dithiole-2-thione (7) by bromination of lithiated vinylene trithiocarbonate. Compound 1 acts as a convenient precursor to a number of asymmetric electron do
Autor:
William Clegg, Gary S. Nichol
Publikováno v:
Acta Crystallographica Section C Crystal Structure Communications. 61:m459-m462
Vigorous reaction of barbituric acid with caesium hydroxide in water resulted in an unexpected coupling product, 5-hydroxyhydurilic acid, complexed to caesium, giving poly[[caesium-μ5-5-hydroxyhydurilato] hemihydrate], {[Cs(C8H5N4O7)]·0.5H2O}n.
Autor:
Carolina Molero, Francisco Larrondo, Lourdes Rodríguez, Paula Sánchez, Mario Pérez-Collado, Juan F. Rodríguez
Publikováno v:
Reactive and Functional Polymers. 64:139-150
Ion exchange can be an appropriate method for the removal of a valuable ion like caesium from polyether polyols. CsOH has recently demonstrated to have improved properties as catalyst for these polymerization reactions. After completion of the polyme
Autor:
Daniela Pieraccini, Cinzia Chiappe
Publikováno v:
Green Chemistry. 5:193-197
A simple method for the N-alkylation of primary amines was developed using ionic liquids as solvent in order to prepare secondary amines selectively. In ionic liquids overalkylation of the initially produced secondary amines is in general markedly re
Publikováno v:
Polymer International. 51:1041-1046
An alternative catalyst to the traditional KOH was studied for preparation of polyols, having high molecular weight (about 6000 g mol -1 ) and low unsaturation content. KOH catalyst is useful until the equivalent weight of the polyol reaches about 1
Publikováno v:
Journal of Materials Chemistry. 12:305-308
The hydrothermal oxidation of Ti metal powder was performed in ca. 0.1–55 mol (kg H2O)−1 caesium hydroxide solutions in the range 150 to 350°C. Lepidocrocite-type caesium titanate (CsxTi2 − x/4□x/4O4) (□ = vacancy) has been successfully ob