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Diffusion and conductance properties of aqueous solutions of tetrasodium 5,11,17,23-tetrakissulfonatemethylen-2,8,14,20-tetra(2-(methylthio)ethyl)resorcinarene

Malagón, Andres ; Velásquez, Luisa F. ; Galindres, Diana M. ; Ribeiro, Ana C.F. ; Valente, Artur J.M. ; Verissimo, Luis M.P. ; Esteso, Miguel A.

Journal of molecular liquids, 2019-02, Vol.276, p.897-901 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Diffusion and conductance properties of aqueous solutions of tetrasodium 5,11,17,23-tetrakissulfonatemethylen-2,8,14,20-tetra(2-(methylthio)ethyl)resorcinarene
  • Autor: Malagón, Andres ; Velásquez, Luisa F. ; Galindres, Diana M. ; Ribeiro, Ana C.F. ; Valente, Artur J.M. ; Verissimo, Luis M.P. ; Esteso, Miguel A.
  • Assuntos: Diffusion coefficient ; Sulfonated resorcinares ; Taylor dispersion ; Transport properties
  • É parte de: Journal of molecular liquids, 2019-02, Vol.276, p.897-901
  • Descrição: Interdiffusion coefficients and molar conductivities of the macrocycle tetrasodium 5,11,17,23-tetrakissulfonatemethylen-2,8,14,20-tetra(2(methylthio)ethyl)resorcinarene (H8Na4RSTio) in non-buffered aqueous solutions at 25.00 °C and at concentrations from (0.001 to 0.020 mol·dm−3) have been measured. The concentration dependence of the conductivities is accurately represented by equations for solutions of strong electrolytes, suggesting that there are no association between anionic species from macrocyclic molecule and Na+ counterions at the concentrations that were used. Furthermore, the limiting conductivities of the H8RSTio4− ions derived independently from the diffusion and conductivity measurements, as well as the Nernst diffusion coefficients derived from diffusion (1.296 × 10−9) m2·s−1 and from conductance (1.298 × 10−9) m2·s−1, are in good agreement. Limiting diffusion coefficient of H8RSTio4− anion was used, together with the Stokes–Einstein equation, to determine the equivalent hydrodynamic radius. •Transport properties of a methylsulfonate resorcinarene have been measured.•Mutual diffusion coefficients were measured using the Taylor technique.•Hydration radii of the resorcinarene were estimated.•Ionic conductivities are justified on the basis of Quint-Viallard theory.•Limiting diffusion coefficients are in agreement with conductivity data.
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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