Choi, E-Joon published the artcileDimesogenic compounds with chiral tails. Synthesis and liquid crystalline properties of a homologous series of α,ω-bis[4-(4′-(S)-(-)-2-methylbutoxycarbonyl-biphenyl-4-oxycarbonyl)phenoxy]alkanes, COA of Formula: C15H14O3, the publication is Bulletin of the Korean Chemical Society (2000), 21(1), 110-117, database is CAplus.
A series of new liquid crystalline dimesogenic compounds with chiral tails was synthesized, and their thermal and liquid crystalline properties were studied. The chain length of the central polymethylene spacers (x) was varied from dimethylene (2) to decamethylene (12). These compounds were characterized by elemental anal., IR and NMR spectroscopy, differential scanning calorimetry (DSC), and cross-polarizing microscopy. All compounds were found to be enantiotropically liquid crystalline, and the values of melting (Tm) and isotropization temperature (Ti) as well as enthalpy change (ΔHi) and entropy change for isotropization (ΔSi) decreased in a zig-zag fashion revealing the so-called odd-even effect as x increases. Their mesomorphic properties fall into 3 categories depending upon x; (a) compounds with x = 2 and 4 formed two different mesophases, smectic and cholesteric phases in that order on heating, and vice versa on cooling, (b) compounds with x = 3, 7, 8, 10, and 11 reversibly formed only the cholesteric phase, and (c) compounds with x = 5, 6, 9, and 12 exhibited only a cholesteric phase on heating, whereas on cooling they formed 2 different mesophases, cholesteric and smectic phases, sequentially.
Bulletin of the Korean Chemical Society published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C15H14O3, COA of Formula: C15H14O3.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics