@article{SchabBalcerzakFlakusJarczykJedrykaetal.2015,
  author    = {Schab-Balcerzak, Ewa and Flakus, Henryk and Jarczyk-Jedryka, Anna and Konieczkowska, Jolanta and Siwy, Mariola and Bijak, Katarzyna and Sobolewska, Anna and Stumpe, Joachim},
  title     = {Photochromic supramolecular azopolyimides based on hydrogen bonds},
  series = {Optical materials : an international journal on the physics and chemistry of optical materials and their applications, including devices},
  volume    = {47},
  journal   = {Optical materials : an international journal on the physics and chemistry of optical materials and their applications, including devices},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {0925-3467},
  doi       = {10.1016/j.optmat.2015.06.029},
  pages     = {501 -- 511},
  year      = {2015},
  abstract  = {The approach of deriving new photoresponsive active supramolecular azopolymers based on the hydrogen bonds is described. Polymers with imide rings, i.e., poly(esterimide)s and poly(etherimide)s, with phenolic hydroxyl or carboxylic groups were applied as matrixes for the polymer dye supramolecular systems. Supramolecular films were built on the basis of the hydrogen bonds between the functional groups of the polymers and various azochromophores, that is, 4-phenylazophenol, 4-[4-(6-hydroxyhexy loxy)phenylazo]benzene, 4[4-(6-hexadecaneoxy)phenylazo]pyridine and 4-(4-hydroxyphenylazo)-pyridine. The hydrogen bonding interaction in azo-systems were studied by Fourier transform infrared spectroscopy and for selected assembles by H-1 NMR technique. The obtained polyimide azo-assembles were characterized by X-ray diffraction and DSC measurements. H-bonds allow attaching a chromophore to each repeating unit of the polymer, thereby suppressing the macroscopic phase separation except for the systems based on 4-[4-(6-hydroxyhexyloxy)phenylazo]benzene. H-bonds systems were amorphous and revealed glass transition temperatures lower than for the polyimide matrixes (170-260 degrees C). The photoresponsive behavior of the azo-assemblies was tasted in holographic recording experiment. (C) 2015 Elsevier B.V. All rights reserved.},
  language  = {en}
}