Crystal Structure, Mesomorphic and Emission Properties of Liquid Crystals Having a 7-(Diethylamino)-3-phenylcoumarin Core

Synthesis and Liquid Crystal Property of New Fluoro Coumarin Carboxylates

“…Further, the addition of coumarin units into Fluoro Coumarin Carboxylates 21 the polymer/oligomer backbones and nanostructured block copolymers were reported to control the liquid crystal properties of the polymers [4] in which the length and position of tail groups and spacers on the coumarin units affect the liquid crystalline properties. Recently, Haruko Takechi et al [7] have also studied the mesomorphic and crystalline properties of 7-(diethyl amino)-3-phenylcoumarin-3-alkylcarboxylates. Similarly, several coumarin derivatives have also been reported to exhibit liquid crystal properties and hence possess many related applications [8][9][10].…”

Crystal Structure of Cholesteryl 1-Naphthoate

“…We have also reported on the crystal structures of some liquid crystals, such as 4-cyanophenyl 4-n-alkoxybenzoates, 1 bis(4-dodecyloxyphenyl)diazene oxide 2 and cholesteryl 4-(7-diethylamino-2-oxo-2H-1-benzopyran-3-yl)benzoate. 3 Cholesteryl benzoate, which had an enantiotropic cholesteric phase, is a representative mesogens in the first discovery of the liquid-crystalline state found by Reinitzer and Lehmann. 4 While cholesteryl 1-naphthoate was not mesomorphic.…”

“…The dihedral angle between the carboxyl group and the least-squares plane of a fused cyclohexane ring (defined by C12/C13/C14/C15/C16/C21) of cholesterol is 58.66(8)˚, which is similar to those (56.0(1) and 66.5(2)˚) of cholesteryl benzoate 4 and cholesteryl 4-(7diethylamino-oxo-2H-1-benzopyran-3-yl)benzoate. 3 There are some intermolecular C-H•p interactions in 1 ( oxo-2H-1-benzopyran-3-yl)benzoate. 3 The combination of intermolecular C-H•p and C-H•O interactions in 1 builds up a three-dimensional network.…”

“…3 There are some intermolecular C-H•p interactions in 1 ( oxo-2H-1-benzopyran-3-yl)benzoate. 3 The combination of intermolecular C-H•p and C-H•O interactions in 1 builds up a three-dimensional network.…”