The temperature-dependent infrared spectroscopy studies of
one novel antiferroelectric liquid crystal (AFLC), known under the
MHPSBO10 acronym, have been undertaken. The FT-IR measurements
have been performed for homeotropic and planar heterogeneous sample
geometries. The main order parameters have been determined and followed
with temperature. The presented study delivers complex insight into the
evolution of the vibrational spectrum upon phase transitions, covering the
whole mesophase range. The experimental studies have been supported by
theoretical studies of MHPSBO10 in confined geometries.