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This is a Experimental Study study.

September 16, 2025Chemistry Letters

Visible-to-ultraviolet photon upconversion in poly(vinyl alcohol) films and unusual quenching by boric acid treatment

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Experimental analysis shows upconversion of visible light to UV in poly(vinyl alcohol), suggesting boric acid quenches emission.

NS-PVA films convert visible light to UV light, enhancing potential applications in photonics.
Boric acid treatment surprisingly quenches the UV emission in stretched poly(vinyl alcohol) films.
Pyrene derivatives used as emitters reveal important photophysical behavior in these polymer films.
This research highlights the intricate balance of treatments affecting polymer film properties, which may guide material improvements.

Saito et al. (2025) studied this question.

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