SA-SATransition in 4-n-Decylphenyl-3′-Methyl-4′-4″-Cyanobenzoyloxy) Benzoate

Abstract
4-n-Decylphenyl-3′-methyl-4′-(4″-cyanobenzoyloxy) benzoate (10 PMCBB) exhibits two smectic A phases with a jump of ∼0.4 Å in the bilayer spacing at the SA-SA transition point. There are some interesting differences in the thermal evolution of the layer spacing of this compound compared to that of its nitro-analogue, viz., 10 PMNBB.