Artículos de revistas
Spectroscopic And Electrochemical Study Of [ru(nh3)5oh2]3+, [ru(nh3)5cl]2+, And [os(nh3)5oh2]3+ Immobilized On Thin Film Of Ti(iv) Oxide Dispersed On The Silica Gel Surface
Registro en:
Polyhedron. , v. 19, n. 22-23, p. 2277 - 2282, 2000.
2775387
10.1016/S0277-5387(00)00489-7
2-s2.0-0034518458
Autor
Do Carmo D.R.
Rodrigues-Filho U.P.
Gushikem Y.
Franco D.W.
Institución
Resumen
[Ru(NH3)5H2O]3+, [Ru(NH3)5Cl]2+ and [Os(NH3)5H2O]3+ were supported on the hydrated titanium alkoxide grafted on silica gel surface. The mononuclear complexes on the matrix surface have been characterized by specific surface area, elemental analysis, UV-Vis spectroscopy and electrochemical techniques (cyclic voltammetry, differential pulse polarography). These supported species exhibit one defined band on the visible region of the electronic spectrum: band [Ru(NH3)5H2O]3+ (668 nm), [Ru(NH3)5 Cl]2+ (676 nm) and [Os(NH3)5H2O]3+ (825 nm), attributed to MIII → TiIV (M = Ru(III) and Os(III)) metal to metal charge transfer process. For the mononuclear anchored species [Ru(NH3)5H2O]3+, [Ru(NH3)5Cl]2+ and [Os(NH3)5H2O]3+, the (E1/2) for the M(III)/M(II) couple at 25°C are, respectively: -0.22, -0.28, and - 1.15 V versus SCE. A formation of an oxo bridge Ti-O-M(NH3)5 (M = Ru, Os) and chloro bridge Ti-Cl-Ru(NH3)5 was postulated for the grafted complexes on the SiO2/TiO2 surface. © 2000 Elsevier Science B.V. 19 22-23 2277 2282 Siperko, L.M., Kuwana, T., (1983) Electrochim. Acta, 130, p. 765 Gushikem, Y., Peixoto, C.R.M., Rodrigues-Filho, U.P., Kubota, L.T., Stadler, E., (1996) J. Colloid Interface Sci., 184, p. 236 Denofre, S., Gushikem, Y., Castro, S.C., Kawano, Y., (1993) J. Chem. Soc., Faraday Trans., 89, p. 1057 Hoffmann, M.T., Neiva, S.M.C., Martins, M.R., Franco, D.W., (1992), p. 257. , H.A. Mottola, J.R. Steinmezt (Eds.), Chemically Modified Surfaces, Elsevier, New YorkNeiva, S.M.C., Santos, J.A.V., Moreira, J.C., Gushikem, Y., Vargas, H., Franco, D.W., (1995) Langmuir, 9, p. 239 Lorencetti, L., Gushikem, Y., Kubota, L.T., Neto, G.O., Fernandes, J.R., (1995) Mikrochim. Acta, 117, p. 239 Kubota, L.T., Gouvea, F., Andrade, A.N., Milagres, B.G., Neto, G.O., (1996) Electrochim. Acta, 41, p. 1465 Rebenstorf, B., Andersson, S.L.T., (1990) J. Chem. Soc., Faraday Trans., 86, p. 2783 Kubota, L.T., Milagres, B.G., Gouvea, F., Neto, G.O., (1996) Anal. Lett., 29, p. 893 Walcarius, A., (1998) Electroanalysis, 10, p. 1217 Kubota, L.T., Gushikem, Y., (1992) Electochim. Acta, 37, p. 2477 Carmo, D.R., Gushikem, Y., Franco, D.W., (1999), p. 325. , J.P. Blitz, C.B. Little (Eds.), Fundamental and Applied Aspects of Chemically Modified Surfaces, The Royal Society of Chemistry, CambridgeFord, P.C., (1970) Coord. Chem. Rev., 5, p. 75 Taube, H., (1979) Pure Appl. Chem., 51, p. 901 Stritar, J.A., Taube, H., (1969) Inorg. Chem., 8, p. 2281 Taube, H., (1981) Comm. Inorg. Chem., 1, p. 17 Forlano, P., Baraldo, L.M., Olabe, J.A., Della Védora, C.O., (1994) Inorg. Chim. Acta, 223, p. 37 Bezerra, C.W.B., Silva, S.C., Gambardella, M.T.P., Santos, R.H.A., Plicas, L.M.A., Tfouni, E., Franco, D.W., (1999) Inorg. Chem., 38, p. 5660 Wilkins, R.G., (1991) Kinetics and Mechanism of reactions of Transition Metal Chemistry, second ed., p. 183. , Wenhein, New York Ellis, I.D., Sykes, G., (1973) J. Chem. Soc., Dalton Trans., p. 573 Kubota, L.T., (1993), Ph.D. Dissertation, Unicamp, BrazilShriver, D.F., (1969) Manipulation of Air Sensitive Compounds, , Mc-Graw-Hill, New York Dixon, N.E., Lawrance, G.A., Lay, P.A., Sargeson, A.M., (1984) Inorg. Chem., 23, p. 2940 Meyer, T., Taube, H., (1968) Inorg. Chem., 7, p. 2369 Lay, P.A., Mangunson, R.H., Sen, J., Taube, H., (1982) J. Am. Chem. Soc., 104, p. 7658 Kalcher, K., Kauffmann, J.M., Wang, J., Svancara, I., Vytras, K., Neuhold, Z., Zang, Z.C., (1995) Electroanalysis, 7, p. 5 Kormann, C., Bahnemann, D.W., Hoffmann, M.R., (1991) Environ. Sci. Technol., 25, p. 494 Kondo, M.M., (1996), Ph.D. Dissertation, Delaware University, USACheng, S.F., Tsai, S.-J., Lee, Y.F., (1995) Catal. Today, 26, p. 87 Adegite, A., Iyun, J.F., Ojo, J.F., (1977) J. Chem. Soc., Dalton Trans., 2, p. 115 Allen, A.D., Stevens, J.R., (1972) Can. J. Chem., 51, p. 92 Krentizen, H., (1976), Ph.D. Dissertation, Stanford University, USABhur, J.D., (1978), Ph.D. Dissertation, Stanford University, USATaube, H., (1976) Surv. Prog. Chem., 6, p. 31 Endicott, J.F., Taube, H., (1989) Inorg. Chem., 4, p. 437 Endicott, J.F., Taube, H., (1962) J. Am Chem. Soc., 84, p. 4984 Kubota, L.T., Gushikem, Y., Perez, J., Tanaka, A., (1995) Langmuir, 11, p. 1009 Kubota, L.T., Gushikem, Y., (1993) J. Electroanal. Chem., 362, p. 219 Lim, H.S., Baclay, D.J., Anson, F., (1972) Inorg. Chem., 11, p. 1460 Coleman, G.M., Gesler, J.W., Shirley, F.A., Kuemptel, J.R., (1973) Inorg. Chem., 12, p. 1036 Shi, C., Anson, F., (1997) Inorg. Chem., 36, p. 2632