Vapour deposited nanocomposite films of perylene bis azo-imides with improved photoresponsiveness by visible light
Source abstract
Abstract
Abstract The paper presents preparation of nanocomposite thin films of three newly synthesized perylene bis azo-imides in polyimide matrix by vapour deposition, results of DFT quantum chemical calculations on the optimized molecular geometry of trans (E) and cis (Z) isomers of the studied dyes as well as photoinduced birefringence measurements to explore potential optical application of these novel materials. Vapour deposited single films of the dyes were studied by reflectance UV-VIS and fluorescence spectroscopy in order to investigate the nature of electron transitions and donor-acceptor interactions between phenylazo fragments and perylene core. The nanocomposite films were prepared through vapour deposition of ODA (4,4′-oxydianiline) and PMDA (pyromellitic dianhydride) as the host polymer matrix and of corresponding perylene bis azo-imide dyes as “guest” at two various concentrations 5 % and 10 % w/w. It was found that nanocomposite films have improved photoresponsivness by applying visible light at λ = 532 nm compared to the single deposited films of dyes. This study shows the applicability of the synthesized dyes embedded in the polyimide matrix as visible-light activated molecular switches.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Photochromic and Fluorescence Chemistry · Luminescence and Fluorescent Materials · Photopolymerization techniques and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (36)
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