Solute-solvent interactions on the surface of reversed phases

A new approach to theoretical evaluation of the Gibbs free energy of solvation was applied for estimation of retention data in high-performance liquid chromatography on reversed phases (RP-HPLC). Simple and improved models of stationary and mobile phases in RP-HPLC were employed. Statistically significant correlations between the calculated and experimental data were obtained for a heterogeneous series of twelve compounds.

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Heats of Solution of Some Sodium and Potassium Salts in Water and in Water-Methanol Mixtures

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19922227 ◽

1992 ◽

Vol 57 (11) ◽

pp. 2227-2234 ◽

Cited By ~ 5

Author(s):

Ján Benko ◽

Oľga Vollárová

Keyword(s):

Transfer Functions ◽

Enthalpies Of Solution ◽

Potassium Salts ◽

Solvent Interactions ◽

Heats Of Solution ◽

Solvent Molecules ◽

Sodium And Potassium

The enthalpies of solution ∆Hs0 were determined for NaSCN, KSCN, NaBrO3, KBrO3, NaClO3, KClO3, NaIO4, KMnO4, KNO2 and NaNO2 in water-methanol mixtures. The transfer functions ∆Ht0 of the salts and anions were calculated based on the extrathermodynamic TPTB assumption. The ∆Ht0 values of the anion obtained from the sodium and potassium salts were compared. The differences observed, particularly at higher concentrations of the cosolvent, are discussed with respect to the interactions between the solvent molecules and the solute-solvent interactions.

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A Comparative Study of Adsorption of Aliphatic Amines at a Gold Electrode

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20052027 ◽

2005 ◽

Vol 70 (12) ◽

pp. 2027-2037 ◽

Cited By ~ 17

Author(s):

Teresa Łuczak

Keyword(s):

Gibbs Energy ◽

Comparative Study ◽

Gold Electrode ◽

Surface Coverage ◽

Standard Gibbs Energy ◽

Gold Surface ◽

Experimental Dependence ◽

Aliphatic Amines ◽

Solvent Interactions ◽

Amine Concentration

Adsorption of aliphatic amines (C1-C4) at the gold electrode was studied by tensammetry. It has been established that the experimental dependence between the gold surface coverage (Θ) and the bulk amine concentration (cA) fits satisfactorily both by the Frumkin and Flory-Huggins isotherms. The standard Gibbs energy of adsorption, ∆G°ad at Emax for Θ < 0.8 has been found to increase in the order methylamine < ethylamine < propylamine < butylamine. This is rationalised in terms of surface-adsorbate, adsorbate-adsorbate and adsorbate-solvent interactions.

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Transfer Thermodynamic Functions ∆Gt0, ∆Ht0 and T∆St0 of cis- and trans-[CoCl2(en)2]+ Isomers in Aqueous Mixtures of Methanol, tert-Butyl Alcohol and Acetonitrile

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20001455 ◽

2000 ◽

Vol 65 (9) ◽

pp. 1455-1463

Author(s):

Oľga Vollárová ◽

Ján Benko

Keyword(s):

Enthalpy Of Solution ◽

Transfer Functions ◽

Partial Molar Volumes ◽

Butyl Alcohol ◽

Aqueous Mixtures ◽

Aqueous Methanol ◽

Solvent Interactions ◽

Tert Butyl Alcohol ◽

Surface Charge Distribution ◽

Cis And Trans

The solubility, partial molar volume and standard integral molar enthalpy of solution of cis- and trans-[CoCl2(en)2]Cl in water, aqueous methanol, aqueous tert-butyl alcohol and aqueous acetonitrile are reported. The transfer functions ∆Gt0, ∆Ht0 and T∆St0 as well as partial molar volumes are used to obtain information on the solute-solvent interactions. Results obtained are discussed in terms of differences in the surface charge distribution in isomeric coordination species.

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Solvatochromic Behaviour of Coumarin 102 in PEGs + Ionic Liquid/ Water Solutions: Role of solute-solvent or solvent-solvent interactions

Journal of Molecular Liquids ◽

10.1016/j.molliq.2021.116483 ◽

2021 ◽

pp. 116483

Author(s):

Md Rabiul Islam ◽

Faiz Warsi ◽

Md Sayem Alam ◽

Maroof Ali

Keyword(s):

Ionic Liquid ◽

Liquid Water ◽

Solvent Interactions ◽

Water Solutions ◽

Coumarin 102 ◽

Solvent Solvent

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Substrate-independent three-dimensional polymer nanosheets induced by solution casting

Chemical Science ◽

10.1039/d1sc03232a ◽

2021 ◽

Author(s):

Cheol Hun Park ◽

Eun Min Go ◽

Kyung Min Lee ◽

Chang Soo Lee ◽

Sang Kyu Kwak ◽

...

Keyword(s):

Three Dimensional ◽

Simple Solution ◽

Solution Casting ◽

Solvent Interactions ◽

Comb Copolymer ◽

Substrate Independent ◽

Polymer Solvent

Unprecedented substrate-independent polymeric 3D nanosheets were induced via simple solution casting using PEGBEM–POEM comb copolymer. A possible mechanism is the change in the polymer–solvent interactions on the surface.

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