2014
DOI: 10.1016/j.tca.2014.07.024
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Thermotropic phase transitions of catanionic dodecylsulfates with multi-charged and multi-tailed quaternary ammonium centers

Abstract: Five novel anhydrous catanionic dodecylsulfates containing multi-charged and multi-tailed quaternary ammonium centers were synthesized and examined with light microscopy, differential scanning calorimetry and X-ray powder diffraction. This study is an attempt to explain the relationship between chemical structure, molecular architecture, phase transition characteristics and thermodynamics, and the nature of intermolecular interactions of the individual amphiphiles that ultimately lead to different mesomorphic … Show more

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Cited by 10 publications
(1 citation statement)
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“…Tomašić, Mihelj, and co-workers extended the research on these types of ILCs to n -dodecylsubstituted salts with [C 12 H 25 OSO 3 ] − , [(1-pentylheptyl)­PhSO 3 ] − , or [cholate] − counterions ( 148-X- m /12 with m = 0–2). They compared the thermal phase behavior of these compounds to that of their analogues with a [N 12,1,1,1 ] + , [N 12,12,1,1 ] + , or [N 12,12,12,1 ] + cation. Many of these salts exhibit one or more thermotropic smectic mesophases; [N 12,12,1,1 ]­[(1-pentylheptyl)­PhSO 3 ], on the other hand, shows a Col hex phase.…”
Section: Ammonium-based Ionic Liquid Crystalsmentioning
confidence: 99%
“…Tomašić, Mihelj, and co-workers extended the research on these types of ILCs to n -dodecylsubstituted salts with [C 12 H 25 OSO 3 ] − , [(1-pentylheptyl)­PhSO 3 ] − , or [cholate] − counterions ( 148-X- m /12 with m = 0–2). They compared the thermal phase behavior of these compounds to that of their analogues with a [N 12,1,1,1 ] + , [N 12,12,1,1 ] + , or [N 12,12,12,1 ] + cation. Many of these salts exhibit one or more thermotropic smectic mesophases; [N 12,12,1,1 ]­[(1-pentylheptyl)­PhSO 3 ], on the other hand, shows a Col hex phase.…”
Section: Ammonium-based Ionic Liquid Crystalsmentioning
confidence: 99%