Dielectric characterization and molecular interaction behaviour in binary mixtures of amides with dimethylsulphoxide and 1,4-dioxane

Ionic conduction in binary mixtures of dipolar liquids

“…The molecular interactions, dipolar ordering, and the structures of the amides molecules with different dipolar liquids over the entire composition range of the binary mixtures were extensively investigated by the ε s measurements [18][19][20][21][22][23][24][25][26]. Amides have a large liquid state range, high polarity and strong solvating power, due to which these are mostly used as solvents in the electrolyte preparations [1][2][3].…”

Studies on Hydrogen-Bond Interactions in Ternary Mixtures of Polar Solvents by Dielectric Constant Measurements

“…[30] c Literature values [31,32] These interactions reduce the effective number of parallel aligned dipoles per unit volume that contribute to the molecular dielectric polarization of these mixed solvents. The magnitude of the ε E values is evidence of the strength of unlike molecule H-bond interactions [25][26][27][28][29][30][31][32][33][34][35][36]. It is found that FA + DMF mixtures have larger values of ε E over the entire concentration range as compared to those of FA + AE mixtures, which suggest that DMF molecules form comparatively stronger H-bond interactions with FA and disturb more parallel aligned dipoles of FA structures.…”

“…Table 1 shows that the investigated polar liquids have a wide range of ε 0 [25][26][27][28][29][30][31]. The static dielectric constant of an ideal liquid mixture, which has no dipolar interactions between unlike molecules shows linear behavior over the entire concentration range of the mixture constituents.…”

“…Earlier [25][26][27][28][29][30][31][32][33][34][35][36], we have extensively investigated the dielectric properties of amides and amines mixed with different polar solvents over the entire concentration range to understand the H-bonding molecular interaction behavior between unlike molecules. In a continuation of our ongoing research on the dielectric constant of mixed solvents, in this manuscript, we have undertaken the dielectric-constant behavior of ternary mixtures consisting of equimolar formamide + N,N-dimethylformamide and formamide + 2-aminoethanol mixed with water, ethyl alcohol, dimethylsulphoxide, and 1,4-dioxane over the entire concentration range.…”

Dielectric studies on binary mixtures of formamide with ethanolamine using the time domain technique

“…Sengwa et al obtained the complex dielectric spectra for N-methylformamide and formamide [15] and formamide with dimethylsulphoxide and 1,4-dioxane [16] binary mixtures and confirmed that the unsimilar molecule hydrogen bond interaction strength was comparatively 1.5 times stronger in formamide-1,4-dioxane mixtures as compared to the formamidedimethylsulphoxide mixtures, and that it varied linearly with the values of dielectric constant and Kirkwood correlation factor of pure formamide. They also carried out the dielectric relaxation study of formamide with some common dipolar aprotic and protic solvents [17] (water, dimethylsulphoxide, N,N-dimethylformamide, acetone, 1,4-dioxane, mono-, di-, and trihydric alcohols, and homologous series of 2-alkoxyethanol, 2-(2-alkoxyethoxy)ethanol, and ethylene glycol oligomers) binary mixtures at 30 • C over the frequency range 10 MHz to 10 GHz using time domain reflectometry (TDR).…”