Cis–trans isomerization and optical laser writing in new heterocycle based azo-polyurethanes
| Autor: | Claudia Romano, Pasqualino Maddalena, Fabio Borbone, Matthias Stolte, Antonio Roviello, Roberto Centore, Antonio Ambrosio, Antonio Carella, Sandra Fusco, Hans-Georg Kuball |
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| Přispěvatelé: | Ambrosio, Antonio, Borbone, Fabio, Carella, Antonio, Centore, Roberto, Fusco, Sandra, H. G., Kuball, Maddalena, Pasqualino, C., Romano, Roviello, Antonio, M., Stolte |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
02 engineering and technology Grating 010402 general chemistry 01 natural sciences law.invention Inorganic Chemistry cis-trans isomerization law surface relief grating Organic chemistry Thermal stability Electrical and Electronic Engineering Physical and Theoretical Chemistry Thin film azopolymer Spectroscopy chemistry.chemical_classification Organic Chemistry Polymer 021001 nanoscience & nanotechnology Laser Atomic and Molecular Physics and Optics Cis trans isomerization 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry polyurethane Physical chemistry 0210 nano-technology Glass transition Isomerization |
| Zdroj: | Optical Materials. 34:724-728 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2011.10.009 |
| Popis: | Three new azo-polyurethanes containing the s-triazolo[3,4-b]thiadiazole heterocycle have been prepared and characterized. The polymers showed glass transition temperatures between 183 °C and 232 °C and a moderate to good thermal stability in air. The thermal cis–trans isomerization around the azo group was analyzed in solution and the kinetic constant of this process was calculated. One of the synthesized polymers was processed in form of thin films (thickness was 1.2 μm) and some experiments of optical laser writing were performed on it: three different surface relief gratings (SRGs) structures were realized at micrometer scale (a square, a concentric square pattern and a grating) indicating this polymer as an interesting candidate for the azo-lithography. |
| Databáze: | OpenAIRE |
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