ChemInform Abstract: ACIDITY IN AQUEOUS MIXED SOLVENT SYSTEMS PART 3, INFLUENCE OF THE ORGANIC SOLVENT MOLECULAR STRUCTURE ON THE ACIDITY OF AQUO-ORGANIC MIXTURES (ACIDITY FUNCTION, WATER STRUCTURE, HYDROPHILIC AND HYDROPHOBIC EFFECTS)

1975 ◽  
Vol 6 (43) ◽  
pp. no-no
Author(s):  
J. P. H. BOYER ◽  
R. J. P. CORRIU ◽  
R. J. M. PERZ ◽  
C. G. REYE
Keyword(s):  
Molecular Structure ◽  
Organic Solvent ◽  
Mixed Solvent ◽  
Water Structure ◽  
Acidity Function ◽  
Hydrophobic Effects ◽  
Organic Mixtures ◽  
Solvent Systems

The Effect of Solvent on the Seebeck Coefficient and Thermocell Performance of Cobalt Bipyridyl and Iron Ferri/Ferrocyanide Redox Couples

2019 ◽  
Vol 72 (9) ◽  
pp. 709 ◽  
Author(s):  
Abuzar Taheri ◽  
Douglas R. MacFarlane ◽  
Cristina Pozo-Gonzalo ◽  
Jennifer M. Pringle
Keyword(s):  
Organic Solvent ◽  
Seebeck Coefficient ◽  
Mixed Solvent ◽  
Waste Heat ◽  
Redox Couple ◽  
Seebeck Coefficients ◽  
Effect Of Solvent ◽  
Redox Couples ◽  
Ligand Interactions ◽  
Solvent Systems

The conversion of thermal energy to electricity using thermoelectrochemical cells (thermocells) is a developing approach to harvesting waste heat. The performance of a thermocell is highly dependent on the solvent used in the electrolyte, but the interplay of the various solvent effects is not yet well understood. Here, using the redox couples [Co(bpy)3][BF4]2/3 (bpy=2,2′-bipyridyl) and (Et4N)3/(NH4)4Fe(CN)6, which have been designed to allow dissolution in different solvent systems (aqueous, non-aqueous, and mixed solvent), the effect of solvent on the Seebeck coefficient (Se) and cell performance was studied. The highest Se for a cobalt-based redox couple measured thus far is reported. Different trends in the Seebeck coefficients of the two redox couples as a function of the ratio of organic solvent to water were observed. The cobalt redox couple produced a more positive Se in organic solvent than in water, whereas addition of water to organic solvent resulted in a more negative Se for Fe(CN)6 3−/4−. UV-vis and IR investigations of the redox couples indicate that Se is affected by changes in solvent–ligand interactions in the different solvent systems.

scholarly journals Photosolvation of [Co(CN)6]3−, trans-[Cr(NH3)2(NCS)4]−, and trans-[Cr(en)2NCSF]+ in aqueous mixed solvent systems

1976 ◽  
Vol 54 (23) ◽  
pp. 3794-3799 ◽  
Author(s):  
Carl Fook Chow Wong ◽  
Alexander David Kirk
Keyword(s):  
Quantum Yield ◽  
Ethylene Glycol ◽  
Organic Solvent ◽  
Aqueous Solutions ◽  
Bulk Viscosity ◽  
Mixed Solvent ◽  
Spectrophotometric Analysis ◽  
Similar Data ◽  
Associative Model ◽  
Solvent Systems

Photosolvation of [Co(CN)6]3−(1), trans-[Cr(NH3)2(NCS)4]−(2) and trans-[Cr(en)2NCSF]+(3) has been studied in various water/methanol, ethanol, acetonitrile, ethylene glycol, glycerol, and acetone mixtures and in aqueous solutions of polyvinylpyrolidone. The quantum yield for thiocyanate loss from 3 was found to be fairly independent of solvent, while for thiocyanate loss from 2, large, and at higher concentrations of organic solvent, specific reductions of quantum yield were observed. The study of 1 using spectrophotometric analysis for [Co(CN)5H2O]2− yielded similar data to some in the literature, but the larger range of systems studied here did not support the reported reduction of quantum yield with bulk viscosity. Furthermore evidence from this and other work suggests that many of the observed quantum yield reductions are only apparent, based on a false assumption that the photosolvation is qualitatively the same in ail mixtures. The data are reinterpreted in terms of competitive solvation by both solvent components. It is argued that this study supports a dissociative model of reaction for 1, but an associative model for the chromium complexes 2 and 3.

scholarly journals Natural product mixture analysis by matrix-assisted DOSY using Brij surfactants in mixed solvents

RSC Advances ◽  
2014 ◽  
Vol 4 (79) ◽  
pp. 42029-42034 ◽  
Author(s):  
Mariano G. S. Vieira ◽  
Nilce V. Gramosa ◽  
Nágila M. P. S. Ricardo ◽  
Gareth A. Morris ◽  
Ralph W. Adams ◽  
...  
Keyword(s):  
Natural Product ◽  
Mixed Solvent ◽  
Mixed Solvents ◽  
Mixture Analysis ◽  
Surfactant Micelles ◽  
Product Mixture ◽  
Solvent Systems ◽  
Nmr Signals

Brij surfactant micelles in mixed solvent systems aid resolution of natural product NMR signals in diffusion-ordered spectroscopy.

scholarly journals A review on conductometric studies of electrolytes in mixed solvent systems to understand ion-ion and ion-solvent interactions

2020 ◽  
Vol 10 (3) ◽  
pp. 5355-5360
Keyword(s):  
Mixed Solvent ◽  
Mixed Solvents ◽  
Chemical Properties ◽  
Electrolyte Solutions ◽  
Molar Conductance ◽  
Extensive Literature ◽  
Solvent Interactions ◽  
Physico Chemical ◽  
Wide Range ◽  
Solvent Systems

The study of ion- solvent interaction is of much importance to investigate the nature of different solutions. Measurement of electrical conductivity and evaluation of physico-chemical properties, such as molar conductance, limiting molar conductance, ion-pair association, Walden product etc. shade light on different intermolecular interactions present in electrolyte solutions. Solvation properties can be varied by mixing two or more solvents. An extensive literature survey on conductometric studies has been carried out on different electrolytes dissolved in a wide range of mixed solvent systems. The reported results show that strong solute-solute, solute-solvent and solvent-solvent interactions are responsible for the physico- chemical behavior of a solution in mixed solvents.

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