Highly luminescent liquid crystals by connecting 1,3,4-oxadiazole with thiazolo[5,4-d]thiazole units.

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dc.contributor.authorSantos, Arthur Bernardo de Souza
dc.contributor.authorManfredi, Alex Molina
dc.contributor.authorSalla, Cristian Andrey Momoli
dc.contributor.authorFarias, Giliandro
dc.contributor.authorGirotto, Edivandro
dc.contributor.authorEccher, Juliana
dc.contributor.authorWestphal, Eduard
dc.contributor.authorCurcio, Sergio Fernando
dc.contributor.authorCazati, Thiago
dc.contributor.authorMalvestiti, Ivani
dc.contributor.authorFalcão, Eduardo Henrique Lago
dc.contributor.authorBechtold, Ivan Helmuth
dc.contributor.authorGallardo, Hugo
dc.date.accessioned2022-03-16T18:18:29Z
dc.date.available2022-03-16T18:18:29Z
dc.date.issued2021pt_BR
dc.description.abstractThe direct bonding between a thiazolo[5,4-d]thiazole and two 1,3,4-oxadiazole units allowed us to create a new and versatile rigid core for luminescent liquid crystal, which showed interesting and variable mesomorphic and photophysical properties. From the 5-bis(5-phenyl-1,3,4-oxadiazol-2-yl)thiazolo[5,4-d]thiazole new core, three molecules with different number of alkoxy chains were synthesized and had their properties correlated with the molecular structure. The molecule with two chains showed a smectic C mesophase, while the mesogens with four and six chains presented hexagonal columnar mesomorphism, which was confirmed by POM and XRD measurements. In addition, the molecule with six chains presented liquid crystalline behavior close to room temperature. In solution, the molecules presented strong photoluminescence ranging from blue to yellow, with quantum yields higher than 0.6. Excited state lifetimes allowed to correlate the fluorescence component associated to the different emitting species to the molecular organization in spin coated films. The molecular energy levels, together with thermal stability and possible charge carrier transport due to molecular packing, suggest that these molecules are promising for optoelectronic applications. Overall, this work contributes to the development of the use of thiazolo[5,4-d]thiazole in liquid crystals, demonstrating its great efficiency and versatility.pt_BR
dc.identifier.citationSANTOS, A. B. de S. et al. Highly luminescent liquid crystals by connecting 1,3,4-oxadiazole with thiazolo[5,4-d]thiazole units. Journal of Molecular Liquids, v. 321, artigo 114887, 2021. Disponível em: <https://www.sciencedirect.com/science/article/abs/pii/S0167732220371294>. Acesso em: 25 ago. 2021.pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.molliq.2020.114887pt_BR
dc.identifier.issn0167-7322
dc.identifier.urihttp://www.repositorio.ufop.br/jspui/handle/123456789/14683
dc.identifier.uri2https://www.sciencedirect.com/science/article/abs/pii/S0167732220371294pt_BR
dc.language.isoen_USpt_BR
dc.rightsrestritopt_BR
dc.subjectFluorescencept_BR
dc.subjectPolycatenarpt_BR
dc.titleHighly luminescent liquid crystals by connecting 1,3,4-oxadiazole with thiazolo[5,4-d]thiazole units.pt_BR
dc.typeArtigo publicado em periodicopt_BR
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