Article ID Journal Published Year Pages File Type
1233623 Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2009 6 Pages PDF
Abstract
Confinement of 4-n-octyl-4′-cyanobiphenyl (8CB) to nanoporous molecular sieves with hexagonal structure of cylindrical pores (4.6 nm diameter) is studied. Thermogravimetric investigations have indicated that the pores are completely filled. Several surface species inside the pores and onto the external surface of the grains were demonstrated by differential thermal analysis and by in situ infrared spectroscopy. Arguments are given that bulk-like monomer and dimer species along with hydrogen bonded ones might coexist in the so-called surface layer, but their population varies drastically as function of the temperature. In addition, chemical changes of the confined liquid crystal are quite possible inside these nanopores, at temperatures lower than for the bulk.
Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
Authors
, , , , , ,