Conductivity and viscosity studies of dimethyl sulfoxide (DMSO)-based electrolyte solutions at 25 °C

✍ Scribed by T. Prem Kumar; P.V.S.S. Prabhu; A.K. Srivastava; U. Bejoy Kumar; R. Ranganathan; R. Gangadharan

• Book ID: 108006249
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 652 KB
• Volume: 50
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(94)01911-8

✦ Synopsis

The specific conductivities and viscosities of lithium perchlorate at four different concentrations in dimethyl sulfoxide (DMSO)-based, binary mixed solvents are reported at 25 "C. The co-solvents are tetrahydrofuran (THF), 1,Zdimethoxyethane (DME) and 1,3dioxolane (DOL). The change in viscosity with solvent composition in all three mixedsolvent systems without electrolyte indicates the occurrence of structural disruption. The observed increase in viscosity with increase in LiClO., concentration suggests an increasing compactness of the structure. A 2 M LiClO, solution shows maximum conductivity at 20 vol.% DMSO in DMSO+DOL and at 40 vol.% DMSO in DMSO+THF mixtures. By contrast, a 1.5 M LiClO., solution has maximum conductivity at 40 vol.% DMSO in DMSO + DME mixtures. Preferential solvation of LiC104 by DMSO occurs in the respective mixtures with THF, DME and DOL.