Electrodilatometry 4: Triton X-100 in cyclohexane

✍ Scribed by Manit Rappon; Shih-Wei (Erwin) Lin

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 544 KB
• Volume: 88
• Category: Article
• ISSN: 0167-7322
• DOI: 10.1016/s0167-7322(00)00137-9

✦ Synopsis

A new technique of electrodilatometry (ED) has been applied to study binary solutions of Triton X-100 in cyclohexane in the concentration range 0.0664 -11.7 m at 298 K. The relative volume changes per square of applied electric field strength known as electrodilatometric effect (R), vary from 0.423 xl0 q7 to 52.8 xl0 q7 m 2 / V 2 . The sign of R is positive, indicating that the volume is increased in the presence of the externally applied fields. By observing the changes in the magnitude of R with respect to the changes in concentration, it is possible to infer that an abrupt change in the value of R may be related to a change in geometry of aggregates. The transformation of aggregate geometry from one type to another is discussed. ED is a very sensitive tool to investigate large molecular assemblies, especially those systems with H-bonds such as TX-100.