Buscar
Mostrando ítems 21-30 de 8666
Mechanistic pathways of aromatic nucleophilic substitution in conventional solvents and ionic liquids
(Royal Society of Chemistry, 2014)
Solvation effects on the reaction mechanism of the title reactions have been kinetically evaluated in 21 conventional solvents and 17 ionic liquids. Solvent polarity affects the catalyzed and non-catalyzed SNAr pathways ...
UV-vis, IR and 1H NMR spectroscopic studies and characterization of ionic-pair crystal violet-oxytetracycline
(2010)
The present study shows the formation and characterization of the ionic-pair between the antibiotic oxytetracycline and the dye crystal violet in ammonia solution pH 9.0 ± 0.2 extracted into chloroform. The characterization ...
Polymer electrolytes based on ethylene oxide-epichlorohydrin copolymers
(Elsevier Science BvAmsterdamHolanda, 2000)
Partition coefficients of organic compounds between water and imidazolium-, pyridinium-, and phosphonium-based ionic liquids
(Springer Heidelberg, 2014-10)
The partition coefficients, P IL/w, of several compounds, some of them of biological and pharmacological interest, between water and room-temperature ionic liquids based on the imidazolium, pyridinium, and phosphonium ...
Synthesis of New Pentaerythritol-Based Gemini Surfactants
(Georg Thieme Verlag Kg, 2001-06)
New dimeric or gemini surfactants bearing double-chain with two or four sulfonate groups, and quadruple-chain with four sulfonate groups, were prepared from pentaerythritol in good overall yields. All these surfactants ...
Ionic fluids containing both strongly and weakly interacting ions of the same charge have unique ionic and chemical environments as a function of ion concentration
(2015-04-07)
Liquid multi-ion systems made by combining two or more salts can exhibit charge ordering and interactions not found in the parent salts, leading to new sets of properties. This is investigated herein by examining a liquid ...
PHASE TRANSFER REACTION CATALYZED BY IONIC LIQUIDS
(Sociedad Chilena de Química, 2007)
Impact of nanoparticles and their ionic counterparts derived from heavy metals on the physiology of food crops
(ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER, 2022)