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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.
Acknowledgment
Financial support of Polish Ministry of Science and Higher Education in scope of Grant NN202 076435 is gratefully acknowledged.
The research was carried out with the equipment purchased thanks to the financial support of the European Regional Development Fund in the framework of the Polish Innovation Economy Operational Program (contract no. POIG.02.01.00-12-023/08).