Optical properties of azo-based poly(azomethine)s with aromatic fluorinated fragments, ether linkages and aliphatic units in the backbone

The aim of this work is to study the optical properties of the core-fluorinated azo-containing polyazomethines with 1,4-tetrafluorobenzene or 4,4′-octafluorobiphenylene dioxyphenylene units and aliphatic fragments in the chain. Due to the reorganization process at the nanometer-scale under UV/Vis ir...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2020-01, Vol.697 (1), p.85-96
Main Authors: Tkachenko, I. M., Kurioz, Yu. I., Kovalchuk, A. I., Kobzar, Ya. L., Shekera, O. V., Tereshchenko, O. G., Nazarenko, V. G., Shevchenko, V. V.
Format: Article
Language:English
Subjects:
Aliphatic compounds
Azo-containing poly(azomethine)s
azo-hydrazone tautomerism
Backbone
Coordination compounds
Crystal structure
Crystallinity
Dielectric loss
fluorinated polymers
Fluorine
Fluoropolymers
Fragments
Irradiation
Liquid crystals
Metal complexes
Optical properties
Optoelectronics
photoinduced dichroism
photoisomerization
Physical properties
Polyazomethines
Polymers
Thermal stability
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Summary:The aim of this work is to study the optical properties of the core-fluorinated azo-containing polyazomethines with 1,4-tetrafluorobenzene or 4,4′-octafluorobiphenylene dioxyphenylene units and aliphatic fragments in the chain. Due to the reorganization process at the nanometer-scale under UV/Vis irradiation, azo-containing polymers (APs) have attracted much attention as materials for biology, optoelectronics, nano-manipulation field, etc. Moreover, the introduction of azomethine group into these polymers enhances not only their optical properties but also expands their practical application. APs polymers have the useful combination of chemical and physical properties such as liquid crystalline states, high nonlinearity and an ability to form metal complexes. It was shown that the optical properties of such polymers could be improved by the inclusion of fluorine. Fluorinated polymers demonstrate high thermal stability and have low dielectric constant and dielectric losses. It should be noted that the presence of flexible moieties in a polymer backbone allows regulating the different properties (solubility, thermostability, optical and liquid crystalline properties) of the final materials.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2020.1731080