Temperature dependence of the positronium yields in polar and nonpolar pure liquids; an experimental test of a phenomenological model

Levay, B.

doi:10.1016/j.chemphys.2004.06.002

Cited by 2 publications

(1 citation statement)

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“…Therefore, it acts as an aprotic protophilic solvent of moderately high dielectric constant (= 36.71) of molecules with a large dipole moment (ì=3.8 D) at 298.15 K [7]. Because of its miscibility with almost all common polar and nonpolar solvents [8][9][10][11][12] it is classified as so-called super solvent. A DMF molecule can interact with an alkanol molecule by virtue of better hydrogen bond acceptor ability of its oxygen atom, resulting in structural and packing effects.…”

Section: Introductionmentioning

confidence: 99%

A study on Volumetric and Viscometric Properties for the Mixtures of DMF and Other Alcohols from Temperatures ranges 303.15K to 323.15K

Khan

Uddin

Islam

et al. 2015

JNS

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Densities, ρ, and viscosities, η, of four binary systems: N,N-dimethyl formamide (DMF) + 1-propanol, DMF + 2-propanol, DMF + butanol and DMF + 1-pentanol have been measured at five different temperatures ranging form 303.15K to 323.15K at an interval of 5K. Excess molar volumes were found to be negative over the entire concentration ranges. The negative excess molar volume decreases with the increase of chain length of alcohol, the magnitude follows the order DMF+ 1-propanol >, + 2-propanol >, + butanol >, + 1-pentanol. The change of viscosity has been found to be sensitive to the chain length of alcohols. Excess viscosities and Grunberg-Nissan interaction parameters have been found to be positive for DMF + 1-propanol and DMF + 2-propanol systems, and negative for other two systems DMF + butanol and DMF + 1-pentanol. The thermodynamic energy of activation; such as, positive ΔG #E each also compatible with the observation.

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