Irradiation-responsive polysulfone film as a colorimetric UVA/UVB differentiator

Monteiro, Bernardo; Leal, João Paulo; Outis, Mani; Casimiro, Maria Helena; Pereira, Cláudia C. L.

http://hdl.handle.net/10362/154620

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Autores

Monteiro, Bernardo

Leal, João Paulo

Outis, Mani

Casimiro, Maria Helena

Pereira, Cláudia C. L.

Resumo(s)

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, 1H-NMR and UV-Vis), scanning electronic microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were conducted to elucidate confinement mechanism and irradiation effects.

Descrição

Funding Information: This work was supported by the Associated Laboratory for Sustainable Chemistry-Clean Processes and Technologies-LAQV, which is financed by national funds from FCT/MEC and co-financed by the ERDF under the PT2020 Partnership Agreement (POCI-01-0145-FEDER–007265).This work was also supported by Fundação para a Ciência e a Tecnologia through the contract no IST-ID/077/2018 (Bernardo Monteiro). Cláudia C. L. Pereira thanks Fundação para a Ciência e a Tecnologia, MCTES, for the Norma transitória DL 57/2016 Program Contract. Publisher Copyright: © 2023 The Royal Society of Chemistry.