Photochemical Transformations in Bis-Methacrylic Polymers for Liquid Crystal Photoalignment: IR Spectroscopy Studies
| Autor: | Georgiy Smolyakov, V. Kyrychenko, V. Zagniy, L. O. Vretik, Oleg Yaroshchuk, T.A. Gavrilko, V. G. Syromyatnikov |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
Fries rearrangement Infrared spectroscopy General Chemistry Polymer Condensed Matter Physics Methacrylate Photochemistry medicine.disease_cause Spectral line chemistry Liquid crystal medicine General Materials Science Fourier transform infrared spectroscopy Ultraviolet |
| Zdroj: | Molecular Crystals and Liquid Crystals. 536:224/[456]-235/[467] |
| ISSN: | 1563-5287 1542-1406 |
| DOI: | 10.1080/15421406.2011.538611 |
| Popis: | Fourier transform infrared spectroscopy (FTIR) is applied to study photochemical transformations in poly(p-methacryloylaminophenyl methacrylate), a material with pronounced liquid crystal photoalignment capability. The characteristic bands corresponding to photosensitive groups of this polymer are identified by comparing its FTIR spectra with the spectra of model compounds having a reduced number of photochemical transformations. The changes in FTIR spectra of this material under ultraviolet illumination give evidence of two Fries rearrangements (in arylamide and arylester groups) and a conversion of C˭CH2 methacrylic bonds. This allows one to refine the microscopic model of photoinduced ordering in this class of polymers. |
| Databáze: | OpenAIRE |
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