Solid state polymorphism of liquid crystals in confined geometries


Abstract:

Solid polymorphism of 4-alkyl-4'-cyanobiphenyl (nCB) was studied so far as a function of thermal history. In this paper we show that metastable solid phases of 4-octyl-4'-cyanobiphenyl (8CB) are also formed when the mesogens are confined in porous silica matrices and we study their structure by neutron diffraction and by Raman spectroscopy. Three metastable solid states are identified : one crystalline phase K', two frozen-in smectic-like phases K s and K's. We discuss the relation between the structure of the metastable solid phases and that of the mesomorph phases. © EDP Sciences / Società Italiana di Fisica / Springer-Verlag 2003.

Año de publicación:

2003

Keywords:

    Fuente:

    scopusscopus
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    Tipo de documento:

    Article

    Estado:

    Acceso restringido

    Áreas de conocimiento:

    • Ciencia de materiales
    • Ciencia de materiales

    Áreas temáticas:

    • Química física
    • Química inorgánica
    • Ingeniería y operaciones afines