Stabilizing Dye-Sensitized Upconversion Hybrids by Cyclooctatetraene DOI

Yuxi Liu,

Lulu Ning,

Yijun Luo

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Lanthanide-doped upconversion nanoparticles (UCNPs) can convert low-energy near-infrared (NIR) light into high-energy visible light, making them valuable for broad applications. UCNPs often suffer from poor light-harvesting capabilities, which be significantly improved by incorporating organic dye antennas. However, the dye-sensitized systems are prone to severe photobleaching in an ambient atmosphere. Here, we present a synergistic approach mitigate introducing triplet state quencher cyclooctatetraene (COT). COT effectively suppresses generation of singlet oxygen quenching states and consumes existing through oxidant reactions. The inclusion extends half-life IR806 4.7-times preventing oxidation its poly(methylene) chains. Without affecting emission intensity dynamics, stabilized dye-UCNPs, demonstrating notable 3.9-fold increase under continuous laser irradiation. Our findings suggest new strategy enhance photostability dyes nanohybrids.

Language: Английский

Stabilizing Dye-Sensitized Upconversion Hybrids by Cyclooctatetraene DOI

Yuxi Liu,

Lulu Ning,

Yijun Luo

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 18, 2024

Lanthanide-doped upconversion nanoparticles (UCNPs) can convert low-energy near-infrared (NIR) light into high-energy visible light, making them valuable for broad applications. UCNPs often suffer from poor light-harvesting capabilities, which be significantly improved by incorporating organic dye antennas. However, the dye-sensitized systems are prone to severe photobleaching in an ambient atmosphere. Here, we present a synergistic approach mitigate introducing triplet state quencher cyclooctatetraene (COT). COT effectively suppresses generation of singlet oxygen quenching states and consumes existing through oxidant reactions. The inclusion extends half-life IR806 4.7-times preventing oxidation its poly(methylene) chains. Without affecting emission intensity dynamics, stabilized dye-UCNPs, demonstrating notable 3.9-fold increase under continuous laser irradiation. Our findings suggest new strategy enhance photostability dyes nanohybrids.

Language: Английский

Citations

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