Synthesis, characterization, and photoresponsive behavior of some polysulfones containing azobenzene moieties in the main chain
| Autor: | Liviu Sacarescu, Anton Airinei, Rodinel Ardeleanu, Nicusor Fifere, Virgil Barboiu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Photoisomerization 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Photochemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound Differential scanning calorimetry Azobenzene chemistry Polymer chemistry Materials Chemistry Thermal stability Polysulfone Physical and Theoretical Chemistry 0210 nano-technology Glass transition Isomerization Spectroscopy Crown ether |
| Zdroj: | Journal of Molecular Liquids. 229:362-370 |
| ISSN: | 0167-7322 |
| Popis: | New photoactive copolysulfones carrying azo crown ether moieties in the main chain were prepared by polycondensation reaction of 4,4′-bis(4-hydroxyphenylazo)dibenzo-18-crown-6, bisphenol A, and bis(4-chlorophenyl)sulfone. The azo polysulfones were characterized via FTIR and 1H NMR spectra, thermogravimetrical analysis, and differential scanning calorimetry. The products showed good thermal stability, with 10% weight loss temperatures ranging from 366 to 426 °C, while the glass transition temperatures varied from 137 to 158 °C. A kinetic study of trans–cis–trans isomerization process based on the evolution of the electronic absorption spectra during UV irradiation was conducted. |
| Databáze: | OpenAIRE |
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