Artículos de revistas
Some Features Of 2 And 4-aminopyridines Anchored On Silica Gel: Properties And Chemisorption Of Metal(ii) Chlorides In Non-aqueous Solutions
Registro en:
Polyhedron. , v. 8, n. 24, p. 2901 - 2906, 1989.
2775387
10.1016/S0277-5387(00)86288-9
2-s2.0-0001218509
Autor
Goncalves A.S.
Airoldi C.
Institución
Resumen
Silica gel surfaces modified with 2- or 4-aminopyridine groups were used to adsorb MCl2 (M = Co, Ni, Cu, Zn) from ethanol and acetone solutions at 298 K. The chemisorption isotherms fitted a modified Langmuir equation very well and are similar for all cations. The capacity of anchored 4-aminopyridine (SIL4) in adsorbing the metallic ion is larger than that of the immobilized 2-aminopyridine (SIL2). The maximum retention capacity has the sequence Cu > Co > Zn in acetone for both surfaces, and Zn > Co > Cu > Ni for SIL2, and Zn > Cu > Co > Ni for SIL4 in ethanol. For a given cation, the variation in enthalpy of solvent-solute exchange on the surface is always larger in ethanol. This process seems to be related to the enthalpy of solvation of the cation involved in the exchange. © 1989. 8 24 2901 2906 Bailey, Langer, Immobilized transition-metal carbonyls and related catalysts (1981) Chemical Reviews, 81, p. 143 Lisichkin, Kudryavtser, Westerenko, (1983) J. Analyt. Chem., 38, p. 1288 Deschler, Kleinschmit, Panster, 3-Chloropropyltrialkoxysilanes?Key Intermediates for the Commercial Production of Organofunctionalized Silanes and Polysiloxanes (1986) Angewandte Chemie International Edition in English, 25, p. 236 Allum, Hancok, Howell, Mckenzie, Pitkethly, Robinson, (1975) J. Organomet. Chem., 87, p. 203 Harley, Vezey, (1977) Adv. Organomet. Chem., 15, p. 189 Brust, Sebestian, Halasz, (1973) J. Chromatogr., 83, p. 15 Deuel, Wartmann, Organische Derivate des Silikagels mit Si?O?C-Bindung I (1959) Helvetica Chimica Acta, 119, p. 1160 Airoldi, Gushikem, Espínola, Adsorption of divalent cations on the silica-gel surface modified with N-(2-aminoethyl-3-aminopropyl) groups (1986) Colloids and Surfaces, 17, p. 314 Gushikem, Moreira, (1985) J. Colloid Interface Sci., 107, p. 70 Airoldi, Gonçalves, (1987) Colloids Surfaces, 28, p. 199 Moreira, Gushikem, (1985) Analytica Chim. Acta, 176, p. 263 Sturgeon, Berman, Willie, Desaulniers, (1981) Analyt. Chem., 53, p. 2337 Sander, Wise, (1987) CRC Crit. Rev. Analyt. Chem., 18, p. 299 Skopenko, Trofimchuk, Zartsev, (1982) Russ. J. Inorg. Chem., 27, p. 1458 Gushikem, da Silva, (1985) J. Colloid Interface Sci., 107, p. 81 Iler, (1979) The Chemistry of Silica., , John Wiley, New York Airoldi, Santos, Jr., (1986) Thermochim. Acta, 104, p. 111 Ryan, Menzie, Spier, The Addition of Silicon Hydrides to Olefinic Double Bonds. Part V. The Addition to Allyl and Methallyl Chlorides (1960) Journal of the American Chemical Society, 82, p. 360 Bushnell, The Crystal and Molecular Structure of Bis-(2,4-pentanedionato)-4-aminopyridinecopper(II) (1971) Canadian Journal of Chemistry, 49, p. 555 Land, Stubls, Wrobleski, (1977) Inorg. Chem., 16, p. 1955 Watanesk, Schilt, (1986) Talanta, 11, p. 95 Adamson, (1976) Physical Chemistry of Surfaces, , 3rd edn., John Wiley, New York McLaren, Crawford, (1973) J. Soil Sci., 24, p. 493 Irving, Williams, 637. The stability of transition-metal complexes (1953) Journal of the Chemical Society (Resumed), p. 3192 Groszek, Selective Adsorption at Graphite/Hydrocarbon Interfaces (1970) Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 314, p. 473 Jednacak-Biscan, Pravdic, (1980) J. Colloid Interface Sci., 75, p. 322 Jednacak-Biscan, Pravdic, Adsorption phenomena on glass surfaces. III. a microcalorimetric study of adsorption of n-butanol on heat treated surfaces of controlled pore glass (1982) Thermochimica Acta, 53, p. 203