Amino Acids‐Enabled Fast‐Restore of Triplet‐Triplet Annihilation Upconversion Luminescence for Background‐Free Sensing of Herbicides

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

Abstract Overuse of herbicides poses a serious threat to ecosystems and human health; thus, the accurate determination herbicide residue is very meaningful. Thanks advantage no background fluorescence interference, upconversion luminescence allows for reliable analysis target molecules in complicated samples. Here, through screening 20 natural amino acids, it discovered that photooxidation methionine exhibited fastest recovery rate triplet‐triplet annihilation (TTA‐UC) via oxygen consumption, which 400‐fold faster compared well‐known oleic acid. Furthermore, oxygen‐resistant, small‐size, red‐to‐blue TTA‐UC nanoparticles with record efficiency (7.2%, normalized 100%) are prepared using hydrophobic butyl as an scavenger. Surface negatively charged able selectively enrich positively paraquat on their surface. Accordingly, photoinduced electron transfer process occurred between triplet excited state photosensitizer electron‐deficient paraquat, quenching luminescence. Relying this principle, TTA‐UC‐based sensing achieved fast response (less than 1 s), high selectivity, low limit detection (1.54 µg mL −1 ). Further, utilized implement lake water without sample pretreatment.

Language: Английский

Triplet-triplet annihilation up-conversion of cationic iridium(III) complex solubilized by organically-modified hectorite in a green solvent

Applied Clay Science, Journal Year: 2025, Volume and Issue: 272, P. 107828 - 107828

Published: April 22, 2025

Language: Английский

Enhanced solar-driven photoelectrocatalytic water treatment and hydrogen evolution with triplet-triplet annihilation upconversion with Mo-doped BiVO4 nanocomposite films

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: unknown, P. 124913 - 124913

Published: Dec. 1, 2024

Language: Английский