Abstract
Banana-shaped homologoues 1,3-phenylene bis{4-[(4-alkoxybenzoyl) sulfanyl]benzoate}, in short nOSOR, where n denotes the number of carbon atoms in the end chains, have been studied using dielectric and electrooptic methods. 9OSOR shows a ferroelectric B1 phase, whereas 12OSOR, 14OSOR exhibit antiferroelectric B2 phase. Dielectric spectra have been measured for two alignments of B2 phase. In the low frequency range a broad collective relaxation process is observed under bias field. This process is connected with fluctuations of ferroelectric domains. The high frequency relaxation originates from molecular reorientation around the long axis.
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