Formation of Diverse Mesophases Templated by a Diprotic Anionic Surfactant
2008 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 14, no 36, 11423-11428 p.Article in journal (Refereed) Published
The synthesis system for mesophase formation, using the diprotic anionic surfactant N-myristoyl-l-glutamic acid (C14GluA) as the structuredirecting agent (SDA) and N-trimethoxylsilylpropyl-N,N,N-trimethylammonium chloride (TMAPS) as the co-structure-directing agent (CSDA), has been investigated and a full-scaled synthesis-field diagram is presented. In this system we have obtained mesophases including three-dimensional (3D) micellar cubic Fm-3m, Pm-3n, Fd-3m, micellar tetragonal P42/mnm, two-dimensional (2D) hexagonal p6mm and bicontinuous cubic Pn-3m, by varying the C14GluA/NaOH/TMAPS composition ratios. From the diagram it can be concluded that the mesophase formation is affected to a high degree by the organic/inorganicinterface curvature and the mesocage–mesocage electrostatic interaction. Bicontinuous cubic and 2D-hexagonalphases were found in the low organic/inorganic-interface curvature zones, whereas micellar cubic and tetragonal mesophases were found in the high organic/inorganic-interface curvature zones. Formation of cubic Fm-3m and tetragonal P42/mnm was favoured in highly alkaline zones with strong mesocage–mesocage interactions, and formation of cubic Pm-3n and Fd-3m was favoured with moderate mesocage–mesocage interactions in the less alkaline zones of the diagram.
Place, publisher, year, edition, pages
Weinheim: Wiley-VCH Verlag GmbH&Co. KGaA , 2008. Vol. 14, no 36, 11423-11428 p.
formation mechanism, mesophases, mesoporous materials, surfactants, synthesis-field diagram
Research subject Materials Science
IdentifiersURN: urn:nbn:se:su:diva-29615DOI: 10.1002/chem.200800766ISI: 000262002900021OAI: oai:DiVA.org:su-29615DiVA: diva2:234475