Spontaneous crystallization at the air-water interface : an unusual feature of gemini surfactant with a rigid spacer
An unusual feature which involves spontaneous crystallization at the air-water interface from aqueous solution was reported for a water-soluble gemini surfactant with xylyl spacer, (p-phenylenedimethylene) bis(dodecyldimethylammonium) dibromide. Polarizing microscope, in situ confocal microscopic Ra...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1992. - 22(2006), 26 vom: 19. Dez., Seite 10877-9 |
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| Weitere Verfasser: | , , , , |
| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2006
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article |
| Zusammenfassung: | An unusual feature which involves spontaneous crystallization at the air-water interface from aqueous solution was reported for a water-soluble gemini surfactant with xylyl spacer, (p-phenylenedimethylene) bis(dodecyldimethylammonium) dibromide. Polarizing microscope, in situ confocal microscopic Raman spectroscopy, and powder XRD were used to characterize the structure of the crystal and investigate the driving force for nucleation. It was inferred that, besides the surface enrichment of amphiphiles and the intra- and intermolecular interaction of alkyl chains, the pi-pi stacking interaction of benzene rings plays an extraordinary role in promoting nucleation and stabilizing crystal structure. A mechanism for constructing supramolecular architectures in situ at the air-water interface directly from aqueous solution via water-soluble amphiphiles with groups favorable for pi-pi stacking interaction was proposed |
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| Beschreibung: | Date Completed 26.01.2007 Date Revised 12.12.2006 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 1520-5827 |