spirooxazine photoisomerization and relaxation in polymer matrices

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ID: 211266
2011
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Ranked #48 of 80 articles by views in 19th international congress of chemical and process engineering, chisa 2010 and 7th european congress of chemical engineering, ecce-7

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Abstract
9′-Hydroxy-1,3,3-trimethylspiro[indoline-2,3′[3H]naphtha[2,1-b]-1,4oxazine] (SPO-7OH) was used in studies of photochromic transformations in polymer matrices. Illumination with UV lamp caused opening the spirostructure of the oxazine with formation of open merocyanine species absorbing at ca. 610 nm. The kinetic studies of thermal relaxation of the open form showed that this process can be described with a biexponential function including both photochemical reaction and rheological behaviour of the polymeric environment. Basing on Arrhenius plot of the rate constant ascribed to the photochemical reaction, the activation energy was determined, which was 66.1 and 84.7 kJ/mole for poly(methyl methacrylate-co-butyl methacrylate) and poly(vinylpyrrolidone) matrix, respectively.
Reference Key
larkowska2011internationalspirooxazine Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Maria Larkowska;Michael Wuebbenhorst;Stanislaw Kucharski
Journal 19th international congress of chemical and process engineering, chisa 2010 and 7th european congress of chemical engineering, ecce-7
Year 2011
DOI
10.1155/2011/627195
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