The Dissociative Power of Solvents

Kahlenberg, Louis; Lincoln, Abraham

doi:10.1021/j150010a002

Cited by 9 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Research into the electrical conductivity (σ) of non-aqueous liquids began largely around the turn of the 20th century, following on from studies of ionic conduction in aqueous solutions. Early studies by Kahlenberg and Lincoln [26], and extended by Lincoln [27], demonstrated that the electrical conduction of salts increased with the increasing dielectric constant of the solvent, emphasizing the importance of dissociation and ionic conduction, even in non-aqueous environments. Subsequent researchers, for example Shaw [28] and Kraus and Fuoss [29], considered the electrical conductivity of organic salts in organic liquids from experimental and theoretical viewpoints.…”

Section: Electrical Conduction In Non-aqueous Liquidsmentioning

confidence: 99%

Electrical Conductivity and Viscosity in Binary Organic Liquid Mixtures: Participation of Molecular Interactions and Nanodomains

Taylor

Zeng

2020

Colloids and Interfaces

View full text Add to dashboard Cite

The present work aims to shed light on recent literature reports suggesting that ionic species are implicated in the electrical conductivity of 1-octanol and its mixtures with hydrocarbons. Other workers have questioned this interpretation, and herein, based on new experimentation and with reference to various literature studies, we consider that molecular interactions are more likely to be responsible. To investigate this, we have studied mixtures of 1-octanol and either silicone oil (SO) or n-dodecane as nonpolar components, using dielectric (in particular electrical conductivity) and viscometric measurements. With reference to the literature, the self-association of alcohols is known to create microheterogeneity in the neat liquids and in mixtures with nonpolar, low dielectric constant liquids, and it has previously been considered to be responsible for the particular solvent properties of alcohols. The present results suggest that the electrical conductivity of alkane/alcohol systems may have similar origins, with percolating pathways formed from octanol-rich nanodomains comprising polar regions containing hydrogen-bonded hydroxyl groups and nonpolar regions dominated by alkyl chains. The percolation threshold found for dodecane/octanol mixtures, in which interactions between the component molecules are found from viscosity measurements to be repulsive, agrees well with results from experimental and theoretical studies of disordered arrangements of packed spheres, and moreover, it is consistent with other published alkane/alcohol results. On the other hand, the situation is more complex for SO/octanol mixtures, in which interactions between the two components are attractive, based on viscosity data, and in which the phase separation of SO occurs at high octanol concentrations. Overall, we have concluded that electrical conductivity in octanol (and potentially all liquid alcohols) and its mixtures with nonpolar molecules, such as alkanes, is consistent with the presence of conducting networks comprising octanol-rich nanodomains formed by self-association, and not as a result of ionic conduction.

show abstract

Section: Electrical Conduction In Non-aqueous Liquidsmentioning

confidence: 99%

Electrical Conductivity and Viscosity in Binary Organic Liquid Mixtures: Participation of Molecular Interactions and Nanodomains

Taylor

Zeng

2020

Colloids and Interfaces

View full text Add to dashboard Cite

show abstract

“…Solvents with a carbonyl polar group are usually weak donors and as a consequence acid-base interactions occur to a slight extent only. Conductance results for the hydrohalide acids in aldehydes and ketones (25,37,106,177) (shown in figure 4) are limited and of qualitative nature only. Measurements are complicated by side reactions, e.g., aldol condensation, and stable electrical resistances are generally uncommon, e.g., the conductivity of hydrogen chloride increases with time in cinnamaldehyde (177) and acetone (132).…”

Section: Conductance Data For Hydrogen Halidesmentioning

confidence: 99%