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Irradiation-responsive polysulfone film as a colorimetric UVA/UVB differentiator
Ist Teil von
Journal of materials chemistry. C, Materials for optical and electronic devices, 2023-04, Vol.11 (15), p.5199-527
Ort / Verlag
Cambridge: Royal Society of Chemistry
Erscheinungsjahr
2023
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
A wearable, small size, flexible and energy consumable free colorimetric detector of UVA radiation and UVB/UVA differentiation was created based on the peculiar stimuli-responsive behaviour of an imidazolium based ionic liquid. Semi-transparent polysulfone films are transformed into opaque and homogenous red films under UVA radiation (315-360 nm), while lower wavelength exposure (280-315 nm) induces increased emission detectable under dark light, with no colour modification of the film under visible light. Thermal analysis (TGA and DSC), spectroscopic analysis (FT-IR,
1
H-NMR and UV-Vis), scanning electronic microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were conducted to elucidate confinement mechanism and irradiation effects.
This research work presents a photochromic flexible film, for fast and real-time detection and differentiation of UVA and/or UVB radiation. The host-guest system was produced by confining 7% (w/w) of a highly fluorinated ionic liquid in polysulfone.