FT-IR and two-dimensional correlation analysis of the liquid crystalline phase transitions in the 4-Bromobenzylidene-4'-alkyloxyanilines.
The FT-IR spectra of the 4-bromobenzylidene-4'-alkyloxyanilines (nBBAA, for n = 4-12) were studied as a function of temperature. The molten state of the alkyloxy chain in smectic B (SmB), smectic A (SmA), and isotropic phases was analyzed. Generalized two-dimensional (2D) correlation spectroscopy has been applied to study changes in the conformational structure and specific interactions of molecules at phase transition in homologous series of nBBAA. A windowed autocorrelation analysis enabled us to locate transition points basing on the spectroscopic data.
The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences , Radzikowskiego 152, 31-342 Kraków, Poland.
Natalia
N
Osiecka
Mirosław A
MA
Czarnecki
Zbigniew
Z
Galewski
Maria
M
Massalska-Arodź