Adsorption of metal halides from ethanol solutions by a 3-n-propylpyridiniumsilsesquioxane chloride-coated silica gel surface

Simulation of adsorption equilibria on hybrid materials: Binding of metal chlorides with 3-n-propylpyridinium silsesquioxane chloride ion exchanger

“…In general, for new kinds of hybrid materials, origins of nonideality and cooperativity are not clear enough. Thus, in contrast to the material studied in the present work, silica and cellulose/Al 2 O 3 carriers modified with pyridinium groups do not demonstrate nonideality effects when metal chlorides are adsorbed [18,23,24]. Many factors may affect the chemisorption process and the state of bound ligands and complexes, for instance, heterogeneous surface topography, porous structure of materials, peculiar conformation and accessibility of fixed reacting groups, electrostatic effects, solvation/desolvation effects, and so on.…”

“…They were used, in particular, to get keener insight into sorption and ion exchange equilibria on surfaces of such hybrids as cellulose acetate fibers (CAF) coated with Al 2 O 3 and modified with nitrogen-containing ligands [17], sol-gel derived SiO 2 /TiO 2 /Sb 2 O 5 mixed oxide [18], CAF coated with highly dispersed aluminum [19,20] and zirconium [21] phosphates, silica gel coated with 3-n-propyl(4-methylpyridinium) silsesquioxane chloride polymer [22,23], CAF coated with n-propyl-1,4-diazabicyclo(2.2.2)octane chloride [24], SiO 2 /Nb 2 O 5 prepared by the sol-gel method and modified with phosphoric acid [25], xerogels containing aniline [26] and xylenol orange groups [27], and others. This paper discusses the simulation of sorption equilibria of metal chlorides on the surface of 3-n-propylpyridinium silsesquioxane chloride polymer from ethanol media.…”

Cellulose acetate-Al2O3 hybrid material coated with N-Propyl-1,4-diazabicyclo [2.2.2] octane chloride: preparation, characterization and study of some metal halides adsorption from ethanol solution

“…The paramagnetic and spectroscopic measurements 21 gave no evidence that the free nitrogen atom in fixed diamine interacts directly with the metal atoms and the species in which the nitrogen atom are included into the inner coordination sphere are formed. On the contrary, it was shown that metal chlorides may be immobilized on the surface in the form of the anionic chlorocomplexes that are electrostatically attracted by the positively charged surface groups 22 . Hence, it was supposed that the adsorption of FeCl 3 is due to the reaction…”

Anisotropic self-organization of hybrid silica based xerogels containing bridged positively charged 1,4-diazoniabicycle[2.2.2]octane chloride group

“…Recently it was reported the synthesis of hybrids containing charged organic groups like quaternary ammonium, pyridinium and dabconium halides, bonded in a pendant way, which showed interesting properties like thermal stability, water solubility, ability to form films over inorganic surfaces [27][28][29][30][31]. Due to these characteristics they can be used as anion-exchangers, stationary phase for chromatography and electrochemical devices [31][32][33][34][35].…”