New Class of Supramolecular Bowl-Shaped Columnar Mesogens Derived from Thiacalixarene Exhibiting Gelation and Organic Light-Emitting Diodes Applications
journal contributionposted on 20.09.2019, 16:36 by Vinay S. Sharma, Anuj S. Sharma, Akshara P. Shah, Priyanka A. Shah, Pranav S. Shrivastav, Mohd Athar
A new class of blue light-emitting bowl-shaped mesogens with the thiacalixarene core appended with 1,3,4-thiadiazole derivatives having peripheral alkoxy side chains have been synthesized and well characterized. The liquid crystalline behavior of present synthesized derivatives was examined by optical polarizing microscopy, differential scanning calorimetry, and X-ray diffraction studies. It was observed that these thiacalixarene derivatives were capable of stabilizing the observed Colh phase with a higher temperature range. The cone-shaped thiacalixarene-based liquid crystals with peripheral alkoxy side chains able to pack into the columns with enriched intermolecular interactions and thermal behavior. All derivatives showed blue luminescence in solution, solid thin-film, and gelation state. The hexagonal columnar phase and emissive nature of thiadiazole-based thiacalixarene compounds having xerogel behavior make them favorable in the application of emissive electronic display devices. The electrochemical properties of these thiacalixarene-based compounds demonstrate the effect of alkyl side chain on the highest occupied molecular orbital–lowest unoccupied molecular orbital energy levels and also exhibited lower electron band gaps. The electroluminescence behavior of the compound 10c was examined as emissive layers in the fabrication of organic light-emitting diodes.
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thiadiazole-based thiacalixarene compoundsSupramolecular Bowl-Shaped Columnar Mesogens Derivedelectroluminescence behaviorgelation stateX-ray diffraction studiesderivativeelectrochemical propertiesNew ClassCol h phaselight-emitting diodeselectron band gapscolumnar phasetemperature rangealkoxy side chainsOrganic Light-Emitting Diodes Applicationsemissive naturescanning calorimetryalkyl side chainxerogel behaviorcompound 10 cenergy levelsemissive layersthiacalixarene-based compoundsdisplay devices