Activity coefficients for CsCl in different methanol-water and ethanol-water mixed solvents were determined at 298.15 K by electromotive force (EMF) measurements of the cell: Cs-ISE|CsCl (m), alcohol (Y), H 2 O (100 -Y)|Ag|AgCl. The cesium ion-selective electrode (Cs-ISE) and the Ag|AgCl electrode used in this work were made in this laboratory and had good Nernstian response. The experimental data were calculated using the Pitzer model. Standard cell potentials and Pitzer parameters were obtained. From these, mean activity coefficients of CsCl, osmotic coefficients of the mixtures, standard Gibbs free energies of transference of CsCl from water to methanol-water or ethanol-water mixtures, and the corresponding medium effects were calculated.

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Activity coefficients for the CsCl + Cs 2 SO 4 + H 2 O ternary system were determined at 298.15 K by electromotive force (EMF) measurements of the cell: Cs ion-selective electrode (ISE)|CsCl(m A ), Cs 2 SO 4 (m B ), H 2 O|Ag|AgCl. The cesium ion-selective electrode (Cs-ISE) and the Ag|AgCl electrode used in this work were made in this laboratory and had a good Nernst response. The experimental data were interpreted using Harned's rule and the Pitzer model. The corresponding parameters required in the Pitzer model have been evaluated for this system. Osmotic coefficients of this system and activity coefficients of the second salt Cs 2 SO 4 were also calculated in the same molality range.

Highly stable 3D Ln-MOFs were constructed by a ternary mixed-ligand. The Sm/Dy-MOFs present dual-emission while the Tb/Eu-MOFs exhibit red/green MC emission. The detection of quercetin and Fe3+ion was realized based on the luminescence Eu-MOF under the excitation of 358 nm.