Abstract
The lyotropic liquid crystal (LLC) behavior of a homologous series of alkyltrimethylphosphonium bromide salts is described. While alkyltrimethylammonium salts are common LLC mesogens that have served in mesoporous materials, phase-transfer catalysis, and polymer−surfactant assemblies, the LLC behavior of the analogous phosphonium salts has been relatively unexplored. Dodecyl- (C12TMPB), tetradecyl- (C14TMPB), and hexadecyltrimethylphosphonium bromide (C16TMPB) were found to exhibit hexagonal, lamellar, and cubic mesophases similar to their ammonium counterparts; however, there is a key difference: Changing to a phosphorus-based headgroup appears to stabilize the cubic phase of C12TMPB and C14TMPB such that the phases extend down to room temperature. Some trends in the lattice parameters of the resulting LLC phases of the alkyltrimethylphosphonium bromides with respect to phase composition and temperature are also discussed. Finally, preliminary use of 31P NMR spectroscopy, as a method of structural chara...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
