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H-bonded complexes containing 1,3,4-oxadiazole derivatives: mesomorphic behaviour, photophysical properties and chiral photoinduction

AuthorsVieira, André A.; Cavero, Emma; Romero, Pilar ; Gallardo, Hugo; Serrano, José Luis; Sierra, Teresa
Issue Date2014
PublisherRoyal Society of Chemistry
CitationJournal of Materials Chemistry C 2: 7029-7038 (2014)
AbstractTwo series of new V-shaped acids derived from 1,3,4-oxadiazoles are described. These acids were used to prepare supramolecular complexes through hydrogen bonding with 2,4-diamino-6-dodecylamino-1,3,5-triazine in a 3:1 ratio, respectively. The formation of the complexes was studied by infrared and NMR techniques. The thermal behaviour and mesomorphic properties of all the complexes were investigated by polarized light optical microscopy, differential scanning calorimetry and X-ray diffraction. Hexagonal and rectangular columnar mesophases were observed for all complexes at room temperature, without evidence of crystallization. The results of circular dichroism studies allowed us to propose that in the liquid crystalline state these materials adopt a helical columnar organization and this chirality can be controlled by irradiation with CPL. Furthermore, the complexes display strong blue luminescence in solution and in the mesophase. © the Partner Organisations 2014.
Identifiersdoi: 10.1039/C4TC00886C
issn: 2050-7526
Appears in Collections:(ICMA) Artículos
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