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Titolo:
Transport coefficients of an inorganic Brownian particle in solution: The tungstosilicate anion
Autore:
Olynyk, T; Jardat, M; Krulic, D; Turq, P;
Indirizzi:
Univ Paris 06, Lab Liquides Ion & Interfaces Chargees, F-75252 Paris 05, France Univ Paris 06 Paris France 05 erfaces Chargees, F-75252 Paris 05, France
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 31, volume: 105, anno: 2001,
pagine: 7394 - 7398
SICI:
1520-6106(20010809)105:31<7394:TCOAIB>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEAN SPHERICAL APPROXIMATION; ELECTROLYTE-SOLUTIONS; SELF-DIFFUSION; MODEL BROWNONS; ASYMMETRIC ELECTROLYTES; DYNAMICS SIMULATIONS; DIFFERENTIAL-PULSE; CRYPTATE SOLUTIONS; IONIC MIXTURES; CONDUCTANCE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Jardat, M Univ Paris 06, Lab Liquides Ion & Interfaces Chargees, 4 Pl Jussieu, F-75252 Paris 05, France Univ Paris 06 4 Pl Jussieu Paris France 05 252 Paris 05, France
Citazione:
T. Olynyk et al., "Transport coefficients of an inorganic Brownian particle in solution: The tungstosilicate anion", J PHYS CH B, 105(31), 2001, pp. 7394-7398

Abstract

Self-diffusion coefficients of the tungstosilicate anion SiW12O404- have been determined in an HClO4 medium of various concentrations by voltammetricmeasurements at a glassy carbon electrode. The results have been extrapolated to zero ionic strength using an analytical transport theory (mean spherical approximation (MSA) transport calculations). The electrical conductivity of aqueous sodium tungstosilicate solutions with and without added salt has been then calculated using both the MSA transport method and Brownian dynamics simulations. Calculations have been compared to our experimental data. It has been shown that the extrapolation at infinite dilution of the conductivity of sodium tungstosilicate solutions gives a value for the self-diffusion coefficient of the polyion consistent with the voltammetric determination. Moreover, the sodium tungstosilicate electrolyte exhibits a behavior similar to a simple electrolyte in aqueous solution, whereas the addition of a salt yields an ionic association phenomenon.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 21:39:41