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Columnar liquid crystalline tris-(ether)triazines with pendant 1,3,4-thiadiazole groups: synthesis, mesomorphic, luminescence, solvatofluorochromic and electrochemical properties

AutorOlate, Felipe A.; Ulloa, J. A.; Vergara, Jorge; Barberá, Joaquín; Parra, M. L.
Palabras claveColumnar liquid crystals
Star-shaped
1, 3, 4-thiadiazole
Fluorescence
Triazine
Fecha de publicación2016
EditorTaylor & Francis
CitaciónLiquid Crystals 43(6): 811-827 (2016)
ResumenNovel columnar liquid crystals whose molecular structures consist of a C star-shaped 1,3,5-triazine unit as a central core, and three pendant 2-phenyl-5-(di-, and/or tri-n-alkoxyphenyl)-1,3,4-thiadiazole arms, containing ether connecting groups, variable number and positions of linear alkoxy chains were synthesised and their mesomorphic properties were studied by differential scanning calorimetry, polarised optical microscopy and X-ray diffraction. The mesomorphic properties were found to be dependent on the length, position and number of the peripheral alkoxy chains. Most compounds form enantiotropic hexagonal columnar phases. These compounds also show photoluminescent properties in the visible region with good quantum yields. Photophysical studies were realised in solution and in solid state. Also, solvatofluorochromism and cyclic voltammetry studies were performed.
URIhttp://hdl.handle.net/10261/148542
DOI10.1080/02678292.2016.1144813
Identificadoresdoi: 10.1080/02678292.2016.1144813
e-issn: 1366-5855
issn: 0267-8292
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