Comparative study of mixed monolayers of a calixarene with a fatty acid and a non-amphiphilic nematic liquid crystal

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Many nematic liquid crystals (NLCs) lack a polar headgroup and thus are not able to form stable monolayers at the air/water (a/w) interface. A way to obtain monomolecular films of these compounds is to incorporate them into host monolayers of amphiphilic molecules. We report a comparative investigation of mixed films of Calix[4]resorcinarene O-octacarboxymethylated (CRO) with the non-amphiphilic NLC MBBA and with the amphiphilic stearic acid (SA). The comparative study is useful for a better understanding of the characteristics of the CRO-MBBA mixed films. Surface-pressure and surface-potential measurements on the monolayers at a/w interface, as well as ellipsometric and spectroscopic measurements on transferred Langmuir-Blodgett (LB) films, confirm that MBBA is additively incorporated into CRO films.
LaTeX article, 6 figures, 8 EPS files, Submitted to Mol. Crys. Liq. Crys, 2000

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/16956

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0010482
 http://arxiv.org/abs/cond-mat/0010482

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arXiv