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Article

Impact of Substitution Pattern and Chain Length on the Thermotropic Properties of Alkoxy-Substituted Triphenyl-Tristriazolotriazines

1
Department for Chemistry, Johannes Gutenberg-University, 55099 Mainz, Germany
2
Institute for Organic Chemistry, Julius-Maximilians-University, 97074 Würzburg, Germany
*
Authors to whom correspondence should be addressed.
Dedicated to Horst Kunz, Mainz, on the occasion of his 80th birthday.
Academic Editors: Viorel Circu, Doina Manaila-Maximean and Valery A. Loiko
Molecules 2020, 25(23), 5761; https://doi.org/10.3390/molecules25235761
Received: 28 October 2020 / Revised: 30 November 2020 / Accepted: 2 December 2020 / Published: 7 December 2020
(This article belongs to the Special Issue Liquid Crystals 2020)
Tristriazolotriazines (TTTs) with a threefold alkoxyphenyl substitution were prepared and studied by DSC, polarized optical microscopy (POM) and X-ray scattering. Six pentyloxy chains are sufficient to induce liquid-crystalline behavior in these star-shaped compounds. Thermotropic properties of TTTs with varying substitution patterns and a periphery of linear chains of different lengths, branching in the chain and swallow-tails, are compared. Generally, these disks display broad and stable thermotropic mesophases, with the tangential TTT being superior to the radial isomer. The structure–property relationships of the number of alkyl chains, their position, length and structure were studied. View Full-Text
Keywords: star-shaped compounds; discotic liquid crystals; X-ray diffraction; differential scanning calorimetry; polarizing optical microscopy; swallow-tail; heterocycles; structure–property relation star-shaped compounds; discotic liquid crystals; X-ray diffraction; differential scanning calorimetry; polarizing optical microscopy; swallow-tail; heterocycles; structure–property relation
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MDPI and ACS Style

Rieth, T.; Tober, N.; Limbach, D.; Haspel, T.; Sperner, M.; Schupp, N.; Wicker, P.; Glang, S.; Lehmann, M.; Detert, H. Impact of Substitution Pattern and Chain Length on the Thermotropic Properties of Alkoxy-Substituted Triphenyl-Tristriazolotriazines. Molecules 2020, 25, 5761. https://doi.org/10.3390/molecules25235761

AMA Style

Rieth T, Tober N, Limbach D, Haspel T, Sperner M, Schupp N, Wicker P, Glang S, Lehmann M, Detert H. Impact of Substitution Pattern and Chain Length on the Thermotropic Properties of Alkoxy-Substituted Triphenyl-Tristriazolotriazines. Molecules. 2020; 25(23):5761. https://doi.org/10.3390/molecules25235761

Chicago/Turabian Style

Rieth, Thorsten, Natalie Tober, Daniel Limbach, Tobias Haspel, Marcel Sperner, Niklas Schupp, Philipp Wicker, Stefan Glang, Matthias Lehmann, and Heiner Detert. 2020. "Impact of Substitution Pattern and Chain Length on the Thermotropic Properties of Alkoxy-Substituted Triphenyl-Tristriazolotriazines" Molecules 25, no. 23: 5761. https://doi.org/10.3390/molecules25235761

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