AI Article Synopsis
- Triplet-triplet annihilation upconversion is a process that transforms low-energy photons into high-energy ones, which is utilized in a novel calcium-sensing system.
- The sensing probe combines a blue light-emitting molecule (perylene) with a calcium-binding component and is energized by a red-light-absorbing sensitizer (PdTPTBP).
- This system exhibits selective calcium detection in the micromolar range and shows an increase in upconverted luminescence under low-oxygen conditions as calcium ion concentration rises, achieving a peak upconversion quantum yield of 0.0020.
Article Abstract
Triplet-triplet annihilation upconversion is a bimolecular process converting low-energy photons into high-energy photons. Here, we report a calcium-sensing system working via triplet-triplet annihilation (TTA) upconverted emission. The probe itself was obtained by covalent conjugation of a blue emitter, perylene, with a calcium-chelating moiety, and it was sensitized by the red-light-absorbing photosensitizer palladium(II) tetraphenyltetrabenzoporphyrin (PdTPTBP). Sensing was selective for Ca and occurred in the micromolar domain. In deoxygenated conditions, the TTA upconverted luminescence gradually appeared upon adding an increasing concentration of calcium ions, to reach a maximum upconversion quantum yield of 0.0020.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11284849 | PMC |
| http://dx.doi.org/10.1021/acs.jpclett.4c01528 | DOI Listing |
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