کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1495076 992926 2012 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Surface relief gratings in azobenzene supramolecular systems based on polyimides
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Surface relief gratings in azobenzene supramolecular systems based on polyimides
چکیده انگلیسی

The paper describes formation of new supramolecular azopolymers based on hydrogen bonds as perspective materials for laser induced surface relief gratings (SRGs) and for polarization gratings. Supramolecular films were built on the basis of hydrogen bonds between the functional groups of polymer and azobenzene derivatives, that is 4-[4-(3-hydroxypropyloxy)phenylazo]-pyridine and 4-[4-(6-hydroxyhexyloxy)phenylazo]pyridine. Polymers with imide rings, i.e., poly(esterimide)s and poly(etherimide)s, with phenolic hydroxyl or carboxylic groups were applied as matrixes for polymer–dye supramolecular systems. They revealed glass transition temperatures (Tg) in the range of 170–260 °C, whereas supramolecular systems exhibited lower Tg (88–187 °C). The polymers were easily soluble in aprotic polar solvents and exhibited remarkable good film forming properties. Moreover, new chromophore 4-[4-(3-hydroxypropyloxy)phenylazo]pyridine was synthesized and characterized. The light induced SRGs formation and simultaneous formation of the polarization gratings were explored in prepared polymer–chromophore assembles films using a holographic grating recording technique. First time to the best of our knowledge SRGs were formed in hydrogen-bonded supramolecular systems based on polyimides. The highest SRG amplitude and thus the highest diffraction efficiency were obtained in poly(esterimide)s with the hydroxyl functional group. Additionally, the thermal stability of the photoinduced surface gratings and polarization gratings were tested revealing in the case of the SRGs partial stability and almost complete erasure of the polarization gratings.

First time the concept of azo-supramolecular polyimides based on H-bonds for laser induced surface relief gratings (SRGs) was investigated. The light induced SRGs formation and simultaneous formation of the polarization gratings were explored in prepared polymer–chromophore assembles films using a holographic grating recording technique. The highest SRG amplitude and thus the highest diffraction efficiency were obtained in poly(esterimide)s with the hydroxyl functional group.Figure optionsDownload high-quality image (113 K)Download as PowerPoint slideHighlights
► We obtained supermolecular assemblies consisting of a polymers matrix and azobenzene chromophores.
► We analyze the influence of hydrogen-bonded polyimide–dye complexes structure on their physical properties.
► First time the concept of azo-supramolecular polyimides for laser induced surface relief gratings was investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 35, Issue 2, December 2012, Pages 155–167
نویسندگان
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