Self-organization of adenine and thymine derivatives in thermotropic liquid crystal

Self-assembly of azobenzene based side-chain liquid crystalline polymer and n-alkyloxybenzoic acids

“…Formation of nematic mesophase was identified by schlieren texture with observation of flashlight while applying small mechanical stress on the liquid crystalline melt. 29 DSC thermogram confirms the formation of liquid crystalline phases for polymer. Azobenzene containing polymer was established two endothermic transitions in between 52 and 94 • C. Two endothermic transitions noticed correspond to crystalline-liquid crystalline (Tm) and liquid crystalline-isotropic (Ti) transition temperatures respectively.…”

“…The spectra of free 4-decyloxybenzoic acid shows sharp band at 1678 cm −1 ascribed C = O stretching, a strong intense band at 3449 cm −1 assigned to OH-stretching of the carboxylic acid group and fermi resonances are observed at 2664 and 2556 cm −1 in A10. 29 The IR spectrum of polymer (P10) exhibits an intense band at 2221 cm −1 attributed to C = N stretching. The infrared absorbance of complexes display a sharp band at 1722 cm −1 ascribed to C = O stretching of benzoic acid moiety.…”

Synthesis and liquid crystalline properties of novel pyridine derivatives

“…Microscopy observations were performed under a Nikon Eclipse E600 POL equipped with a hot stage (Linkam LK-600PH). Cholestery p-(ω-bromoalkyloxy)benzoates (1) were prepared by the reaction of cholesteryl p-hydroxybenzoate [18] and α,ω-dibromoalkane according to the procedure described before [16,17].…”

“…pyrimidine nucleic acid bases [10][11][12][13][14]. On the other hand, cholestery benzoate is the first liquid crystalline compound [15], and in this connection, we have studied the reaction of nucleic acid bases with cholestery p-(ω-bromoalkyloxy)benzoates (1) [16,17]. The present paper reports a synthesis of new liquid crystalline compounds with pyridine ring by a treatment of 4-hydroxypyridine with 1.…”

Discotic Star Mesogen with Thymine Nucleobases Exhibiting a Rare Gyroid Cubic Mesophase with 3D Conductivity

“…[3][4] Thermotropic LCs with nucleobases are rare, but are known for uracil, adenine, thymine, cytosine or guanine bases attached to non-polar building blocks to generate rodshaped, wedge-shaped and phasmidic amphiphiles. [5][6][7][8][9][10][11][12][13] Discshaped mesogens with linked DNA bases have not been studied so far. Such mesogens can be envisaged by combination of star mesogen 2 and three thymine bases 3, which are tethered between the conjugated arms to give target molecule 1 (Scheme 1).…”