ZB 10 - Soft Condensed Matter (R. Holyst)

Aggregation and Layering Transitions in Thin Films of X-, T-, and Anchor-Shaped Bolaamphiphiles at the Air-Water Interface

Author(s): Niton, Patrycja and Zywocinski, Andrzej and Paczesny, Jan and Marcin and Holyst, Robert and Glettner, Benjamin and Robert and Tschierske, Carsten and Pociecha, Damian and Gorecka, Ewa
Title: Aggregation and Layering Transitions in Thin Films of X-, T-, and Anchor-Shaped Bolaamphiphiles at the Air-Water Interface
Abstract: Aggregation in Langmuir films is usually understood as being a grouping of molecules turning into chaotic three-dimensional and is considered an unwanted phenomenon causing irreversible In this work we present the studies of 11 compounds from the of specific surfactants, known as bolaamphiphiles, that exhibit aggregation and, in many cases, transition to well-defined which can be considered as a layering transition. These incorporate rigid pi-conjugated aromatics as hydrophobic glycerol-based polar groups and hydrophobic lateral chains. of different shapes (X-, T-, and anchor) were studied and The key property of these compounds is the partial of the lateral chains linked to the rigid cores of the The most interesting feature of the compounds is that, on their shape and degree of fluorination, they are able to aggregation and preserve a monolayer structure up to relatively surface pressures (T-shaped and some X-shaped molecules), or create trilayers (X-and anchor-shaped molecules). Experimental were performed using Langmuir balance, surface potential and X-ray reflectivity measurements.
Pages: 5861-5873
Journal: CHEMISTRY-A EUROPEAN JOURNAL
Volume: 17
ID: ISI:000291594800014
Year: 2011
DOI: 10.1002/chem.201003671