Polar derivatives of [closo-1-CB9H10]−and [closo-1-CB11H12]−anions as high Δεadditives to a nematic host: a comparison of the CH2CH2and COO linking groups

Autor:	Anna Pietrzak, Piotr Kaszynski, Andrienne C. Friedli, Rafal Jakubowski, Muhammad O. Ali, Jacek Pecyna
Rok vydání:	2021
Předmět:	Inorganic Chemistry Crystallography chemistry.chemical_compound Materials science chemistry Group (periodic table) Liquid crystal Polar Density functional theory Dielectric Crystal structure Pyridinium Single crystal
Zdroj:	Dalton Transactions. 50:3671-3681
ISSN:	1477-9234 1477-9226
DOI:	10.1039/d1dt00211b
Popis:	A series of liquid crystalline pyridinium and sulfonium derivatives of the [closo-1-CB9H10]− and [closo-1-CB11H12]− anions containing the CH2CH2 linking group was prepared and their molecular and crystal structures were determined by single crystal XRD methods. Thermal and dielectric properties of the series were evaluated in a weakly polar nematic host. The highest extrapolated dielectric anisotropy, Δe, was observed for pyridinium zwitterions (up to 56.0). The dielectric data were analyzed with the Maier–Meier formalism augmented with density functional theory calculations, and the results were compared to those obtained for the analogous ester derivatives (COO linking group). The effect of the linking group on thermal and electrooptical properties is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3e883364bdf323ba7c20bb8d848fdcd8 https://doi.org/10.1039/d1dt00211b Zobrazit plný text záznamu