Columnar Liquid Crystalline Glasses by Combining Configurational Flexibility with Moderate Deviation from Planarity: Extended Triaryltriazines - Archive ouverte HAL Access content directly
Journal Articles Chemistry - A European Journal Year : 2023

Columnar Liquid Crystalline Glasses by Combining Configurational Flexibility with Moderate Deviation from Planarity: Extended Triaryltriazines

Hugo Marchi Luciano
Carlos Stadtlober
  • Function : Author
Giliandro Farias
Fabien Durola
Juliana Eccher
Harald Bock
Hugo Gallardo
André Vieira

Abstract

Triply phenanthryl‐ and tetrahelicenyl‐substituted triazine‐hexaalkyl esters with short alkyl chains show glass transitions conveniently above room temperature within the hexagonal columnar liquid crystalline state, resulting in a solid columnar order at room temperature. As the hexagonal columnar mesophase is easily aligned with the director perpendicular to a solid substrate, such glassy columnar liquid matrices are aimed at for the orientation of guest emitters, to obtain anisotropic emission. A condition for face‐on alignment on substrates are attainable melting and clearing temperatures, which is achieved with the moderately nonplanar tetrahelicenyl derivatives in spite of their short alkyl periphery. An unusual phase transition between two columnar mesophases of same hexagonal symmetry, but very different long‐distance regularity of the column lattice, is found in one phenanthryl homolog.
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Dates and versions

hal-04238983 , version 1 (12-10-2023)

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Fabrícia Nunes da Silva, Hugo Marchi Luciano, Carlos Stadtlober, Giliandro Farias, Fabien Durola, et al.. Columnar Liquid Crystalline Glasses by Combining Configurational Flexibility with Moderate Deviation from Planarity: Extended Triaryltriazines. Chemistry - A European Journal, 2023, 29 (24), ⟨10.1002/chem.202203604⟩. ⟨hal-04238983⟩

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