Аннотация
A new series of push–pull azo-dyes containing tricyanodiphenyl electron-withdrowing block, namely (4-N,N-dialkylaminophenyl)azobiphenyl-2,3’,4’-tricarbonitriles, was proposed and synthesized. The azo-dyes possess high temperature stability and are prone to form polymorph modifications. DSC measurements indicated solid-phase transitions of these polymorphs. X-ray diffraction (XRD) analysis revealed that in all solved structures, there is a network of short intermolecular contacts between HArom atoms and N atoms of cyano groups. The supramolecular structure of these contacts depends on the alkyl chain length in the aniline moiety, and changes after temperature induced phase transitions.
Язык оригинала | английский |
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Страницы (с-по) | 88-98 |
Число страниц | 11 |
Журнал | Thermochimica Acta |
Том | 669 |
DOI | |
Состояние | Опубликовано - 10 ноя 2018 |