The effect of pressure on the various types of phase transitions in 60PDOB has been studied. The smectic C phase is completely bounded with a resulting triple point at (2.22 ± 0.05) kbar, (374 ± 0.7)K. Two pressure induced phases are observed, one above 1.4 kbar and the other for pressures beyond 2.2 kbar. Also, this compound, which was hitherto believed to exhibit three smectic phases B, C and A, is found to exhibit an additional mono-tropic smectic E phase at atmospheric pressure.
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Shashidhar et al. (1981) studied this question.
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