Red-to-Blue Triplet–Triplet Annihilation Upconversion for Calcium Sensing

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 emi...

Full description

Saved in:
Bibliographic Details
Published inThe journal of physical chemistry letters Vol. 15; no. 29; pp. 7430 - 7435
Main Authors Andreeva, Valeriia D., Regeni, Irene, Yang, Tingxiang, Elmanova, Anna, Presselt, Martin, Dietzek-Ivanšić, Benjamin, Bonnet, Sylvestre
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 25.07.2024
Subjects
Letter
Physical Insights into Materials and Molecular Properties
Online AccessGet full text

Cover

More Information
Summary: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 Ca2+ 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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1948-7185
1948-7185
DOI:10.1021/acs.jpclett.4c01528