TY  - JOUR
A1  - Schab-Balcerzak, Ewa
A1  - Flakus, Henryk
A1  - Jarczyk-Jedryka, Anna
A1  - Konieczkowska, Jolanta
A1  - Siwy, Mariola
A1  - Bijak, Katarzyna
A1  - Sobolewska, Anna
A1  - Stumpe, Joachim
T1  - Photochromic supramolecular azopolyimides based on hydrogen bonds
JF  - Optical materials : an international journal on the physics and chemistry of optical materials and their applications, including devices
N2  - 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.
KW  - Azobenzene
KW  - Polyimides
KW  - Photoinduced optical anisotropy
KW  - Surface relief grating
Y1  - 2015
U6  - https://doi.org/10.1016/j.optmat.2015.06.029
SN  - 0925-3467
SN  - 1873-1252
VL  - 47
SP  - 501
EP  - 511
PB  - Elsevier
CY  - Amsterdam
ER  -