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Issue 33, 2013
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Inverse Pm[3 with combining macron]n cubic micellar lyotropic phases from zwitterionic triazolium gemini surfactants

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Abstract

Inverse lyotropic liquid crystal phases comprising spatially-limited aqueous nanodomains have potentially wide-ranging applications, including the encapsulation and selective delivery of small molecules and as aqueous nanoreactors for molecular catalysis. We report the aqueous self-assembly of two homologous, zwitterionic bis(alkyltriazolium sulfobetaine) gemini surfactants into previously unknown inverse cubic micellar phases with Pm[3 with combining macron]n symmetry (space group #223). Using temperature-dependent X-ray scattering, we demonstrate that these highly ordered, inverse discontinuous micellar phases are stable over remarkably wide amphiphile concentration windows between T = 30–90 °C at ambient pressure. These observations suggest that the packing arrangements adopted by structurally anisotropic gemini surfactants enable ready access to only the third known inverse micellar lyotropic phase, and the first one to exhibit a tetrahedral close-packing of inverse micelles.

Graphical abstract: Inverse Pm [[3 with combining macron]] n cubic micellar lyotropic phases from zwitterionic triazolium gemini surfactants

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Publication details

The article was received on 03 May 2013, accepted on 12 Jul 2013 and first published on 15 Jul 2013


Article type: Communication
DOI: 10.1039/C3SM51238J
Citation: Soft Matter, 2013,9, 7919-7922
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    Inverse Pm[3 with combining macron]n cubic micellar lyotropic phases from zwitterionic triazolium gemini surfactants

    D. V. Perroni and M. K. Mahanthappa, Soft Matter, 2013, 9, 7919
    DOI: 10.1039/C3SM51238J

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