Photosensitization of singlet oxygen by O,N-doped carbon dots
Ibrayev N. Amanzholova G. Minaev B. Khamza T.
May 2026Elsevier B.V.
Journal of Luminescence
2026#293
Carbon dots doped with oxygen- and nitrogen-containing functional groups were synthesized to act as photosensitizers for singlet oxygen Ο2(Δg1) generation. Structural studies revealed the presence of O,N-containing functional centers on the surface of carbon dots. The absorption and luminescence properties were investigated in water-ethanol mixtures. The effects of external heavy atoms and temperature on the delayed fluorescence of the carbon dots were examined. It was found that increasing the carbon dot concentration leads to an increase in Ο2(Δg1) phosphorescence intensity, while the lifetime of carbon dots decreases. Upon the addition of Ο2(Σg−3) molecules to a degassed solution of carbon dots, a singlet-triplet annihilation occurs, the efficiency of which is governed by the concentration ratio of triplet state of carbon dots to Ο2(Δg1) molecules. The quantum yield of Ο2(Δg1) generation is equal to ΦΔ = 0.29.
Carbon dots , Phosphorescence , Photodynamic therapy , Sensitization , Singlet oxygen
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Institute of Molecular Nanophotonics, Buketov Karaganda National Research University, Karaganda, 100024, Kazakhstan
Bohdan Khmelnytsky National University, Cherkasy, 18031, Ukraine
Istanbul Technical University, Maslak, Sariyer, Istanbul, 34485, Turkey
Institute of Molecular Nanophotonics
Bohdan Khmelnytsky National University
Istanbul Technical University
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026