Lopez-Velazquez, Delia published the artcileStructure and Phase Transitions of Ethyl-4′-n-undecyloxybiphenyl-4-carboxylate and Its Acid Derivative, SDS of cas: 50670-76-3, the publication is Molecular Crystals and Liquid Crystals (2008), 222-236, database is CAplus.
Ethyl-4′-n-undecyloxybiphenyl-4-carboxylate, 2(11)OBC, and 4′-n-undecyloxybiphenyl-4-carboxylic acid, (11)OBC, are smectic liquid crystals precursors of low mol. weight premesogens, and of potential liquid crystal macromols. The single-crystal X-ray study of 2(11)OBC showed that it crystallizes in a non-centrosym. space group with mols. stacked along the short axis [010] and [001] without significant π···π or CH···π interactions. Such an arrangement may explain its strong tendency to form smectic mesophases. Both biphenyl derivatives have a rich polymesomorphism whose phase sequences were determined by DSC, optical microscopy and diffraction profiles using synchrotron radiation. These profiles indicated quite similar phase transitions in the two samples, although very different transition temperatures The phase transitions (on cooling) of 2(11)OBC are: Isotropic → SmA (101°) → SmB (88°) → SE (79°) → crystal phase (43°), while those (on cooling) of (11)OBC are the following: Isotropic → SmA (246°) → SmB (192°) → SX (162°) → SE (148°) → crystal phase (62°). The much higher transition temperatures for the acid derivative are explained by considering that this mol. forms dimers through classical O-H···O hydrogen bonds involving the carboxylic groups.
Molecular Crystals and Liquid Crystals 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, SDS of cas: 50670-76-3.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics