TY  - JOUR
A1  - Rullens, F
A1  - Vuillaume, Pascal Y.
A1  - Moussa, Alain
A1  - Habib-Jiwan, Jean-Louis
A1  - Laschewsky, André
T1  - Ordered polyelectrolyte "Multilayers". 7. Hybrid films self-assembled from fluorescent and smectogenic poly(diallylammonium) salts and delaminated clay
N2  - Homopolymers were prepared from diallylammonium monomers bearing 4-methylcoumarin and 4-cyanobiphenyl as fluorescent and mesogenic side groups, as well as their copolymers with diallyldimethylammonium chloride (DADMAC). Organic-inorganic hybrid films were electrostatically self-assembled via the layer-by-layer technique on silicon wafers and quartz plates from the chromophore-bearing polymers and an exfoliated synthetic hectorite. Photophysical studies performed in solution as well as in the self-assembled films demonstrated only a weak tendency for aggregation of the chromophores in the macromolecules. Moreover, assemblies made from the polymers carrying the cyanobiphenyl mesogen were found to exhibit a pronounced internal order
Y1  - 2006
UR  - http://pubs.acs.org/doi/full/10.1021/cm060209x
U6  - https://doi.org/10.1021/Cm060209x
ER  - 
TY  - JOUR
A1  - Wattebled, Laurent
A1  - Laschewsky, André
A1  - Moussa, Alain
A1  - Habib-Jiwan, Jean-Louis
T1  - Aggregation numbers of cationic oligomeric surfactants : A time-resolved fluorescence quenching study
N2  - The micelle aggregation numbers (N-agg) of several series of cationic oligomeric surfactants were determined by time-resolved fluorescence quenching (TRFQ) experiments, using advantageously 9,10-dimethylanthracene as fluorophore. The study comprises six dimeric ("gemini"), three trimeric, and two tetrameric surfactants, which are quaternary ammonium chlorides, with medium length spacer groups (C-3-C-6) separating the individual surfactant fragments. Two standard cationic surfactants served as references. The number of hydrophobic chains making up a micellar core is relatively low for the oligomeric surfactants, the spacer length playing an important role. For the dimers, the number decreases from 32 to 21 with increasing spacer length. These numbers decrease further with increasing degree of oligomerization down to values of about 15. As for many conventional ionic surfactants, the micelles of all oligomers studied grow only slightly with the concentration, and they remain in the regime of small micelles up to concentrations of at least 3 wt %.
Y1  - 2006
UR  - http://pubs.acs.org/doi/full/10.1021/la052414h
U6  - https://doi.org/10.1021/La052414h
ER  -