کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7826137 1503032 2018 39 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The first evidence of redox activity of polyimide systems modified with azo groups with photo-induced response
ترجمه فارسی عنوان
اولین شواهد فعالیت بازآوری از سیستم های پلی آمید اصلاح شده با گروه های آزو با پاسخ عکس القا شده
کلمات کلیدی
آزو کپلیلییدید، مرفولوژی، عکس ایزومریزی، فلورسانس، ولتامتری سیسیک،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Aromatic azo-copolyimides based on hexafluoroisopropylidene dianhydride and a mixture of 2,4-diamino-4′-methylazobenzene and different aromatic diamines in 0.25:0.75 M ratio were studied with regard to their photo-optical and electrochemical properties. Absorbance spectra within the UV-Vis range of polymer solutions along with the UV-Vis-NIR transmission and reflectivity of polymer films were measured. Thus, the optical parameters such as energy gap, yellowness and refractive index were obtained for polymer films, while the position of absorption bands was comparatively discussed for polymer solutions in correlation with the structural motif. Trans-cis photo-isomerization of azobenzene moiety was observed and thoroughly analysed for both polymer solutions and thin films through systematic studies of UV-Vis and fluorescence spectral features. On the other hand, the electrochemical activity (i.e., oxidation and reduction capability) of the understudy azo-copolyimides was explored by cyclic voltammetry (CV) measurements both in fluid and solid state. Owing to their ability to promote favorable properties, applications in electronic devices with photo-controllable functions are foreseen.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 129, August 2018, Pages 64-75
نویسندگان
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