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Ambient-temperature near-IR phosphorescence and potential applications of rhenium-oxo corroles

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Abstract

Presented herein is a first photophysical investigation of a series of rhenium(V)-oxo tris(p-X-phenyl)corroles, Re[TpXPC](O), where X = CF3, F, H, CH3, and OCH3. The complexes all exhibit near-IR phosphorescence in anoxic toluene at room temperature, with emission maxima at 780 ± 10 nm, phosphorescence decay times of 56–74 μs and quantum yields of 1.07–1.52%, the highest reported to date for phosphorescent corrole derivatives. We have also demonstrated that the dyes may serve as indicators in optical oxygen sensors and as sensitizers in triplet–triplet-annihilation-based upconversion. Although the ReO corroles are not superior to benchmark benzoporphyrin complexes that are currently used in these applications, they may prove useful in certain areas such as optical multianalyte sensing owing to improved flexibility in the available spectral properties of the dyes. The high thermal and photochemical stability of the complexes also bodes well for their deployment as new, phosphorescent sensitizers in photodynamic therapy.

Graphical abstract: Ambient-temperature near-IR phosphorescence and potential applications of rhenium-oxo corroles

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Publication details

The article was received on 22 Oct 2018, accepted on 18 Feb 2019 and first published on 25 Feb 2019


Article type: Paper
DOI: 10.1039/C8PP00473K
Citation: Photochem. Photobiol. Sci., 2019, Advance Article

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    Ambient-temperature near-IR phosphorescence and potential applications of rhenium-oxo corroles

    S. M. Borisov, R. F. Einrem, A. B. Alemayehu and A. Ghosh, Photochem. Photobiol. Sci., 2019, Advance Article , DOI: 10.1039/C8PP00473K

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