Gutenberg Open Science: Synthesis, thermal, and optical properties of tris(5-aryl-1,3,4-oxadiazol-2-yl)-1,3,5-triazines, new star-shaped fluorescent discotic liquid crystals

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-7055

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DC Field	Value	Language
dc.contributor.author	Tober, Natalie	-
dc.contributor.author	Rieth, Thorsten	-
dc.contributor.author	Lehmann, Matthias	-
dc.contributor.author	Detert, Heiner	-
dc.date.accessioned	2022-05-31T07:41:22Z	-
dc.date.available	2022-05-31T07:41:22Z	-
dc.date.issued	2019	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/7069	-
dc.description.abstract	The synthesis of tris(aryloxadiazolyl)triazines (TOTs), C3-symmetrical star-shaped mesogenes with a 1,3,5-triazine center, 5-phenyl-1,3,4-oxadiazole arms, and various peripheral alkoxy side chains is reported. Threefold Huisgen reaction on a central triazine tricarboxylic acid and suitable aryltetrazoles yields the title compounds. Selected analogues with a benzene center are included in this study and allow for an evaluation of the impact of the central unit on the physical properties. Thermal (differential scanning calorimetry, DSC; polarization optical microscopy, POM), optical (UV/Vis, fluorescence), electric (time of flight, TOF), and structural (single crystal; wide-angle X-ray scattering, WAXS) properties of these compounds were investigated. The modification of alkoxy chain length and substitution pattern allows for a tuning of the physical properties. TOTs emit blue to yellow light, depending on conjugation length, donor–acceptor substitution, and solvent polarity, whereas concentration quenches and aggregation enhances the emission. The width of the mesophases is typically around ΔT=100–150 K but can even exceed 220 K. Polarization optical microscopy and X-ray diffraction on oriented filaments reveal that TOTs are highly ordered liquid crystals (LCs) with long-range hexagonal columnar structure.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY-NC-ND	*
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/	*
dc.subject.ddc	540 Chemie	de_DE
dc.subject.ddc	540 Chemistry and allied sciences	en_GB
dc.title	Synthesis, thermal, and optical properties of tris(5-aryl-1,3,4-oxadiazol-2-yl)-1,3,5-triazines, new star-shaped fluorescent discotic liquid crystals	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-7055	-
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Chemistry - a European journal	de
jgu.journal.volume	25	de
jgu.journal.issue	67	de
jgu.pages.start	15295	de
jgu.pages.end	15304	de
jgu.publisher.year	2019	-
jgu.publisher.name	Wiley-VCH	de
jgu.publisher.place	Weinheim	de
jgu.publisher.issn	1521-3765	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	540	de
jgu.publisher.doi	10.1002/chem.201902975	de
jgu.organisation.ror	https://ror.org/023b0x485
Appears in collections:	JGU-Publikationen

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