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• W4310943023 abstract "We report the synthesis and photophysical characterization of novel halogenated dipyrrolonaphthyridine-diones (X2 -DPNDs, X = Cl, Br, and I), as candidates for photodynamic therapy (PDT) application. Apart from the heavy atom-induced spin-orbit coupling (SOC) dynamics in the investigated X2 -DPNDs, it was found that the position of the halogen atom (relative to the nitrogen of the pyrrole ring) also influenced the triplet excited state behavior. Interestingly, the faster/efficiency sensitization of 3 O2 to 1 O2 using X2 -DPND correlates with the rate of triplet population, kISC >1.6 × 108 s-1 for I2 -DPND vs kISC >2.9 × 109 s-1 for Cl2 -DPND and Br2 -DPND (where τISC = 343 ± 3 ps for I2 -DPND and τISC = 5-6 ns for Cl2 -DPND and Br2 -DPND are the lowest time constants/values for ISC). Furthermore, the heavy atom-induced SOC in Cl2 -DPND and Br2 -DPND did not lead to a reduction of the corresponding fluorescence (ca 75% vs 67% for the parent DPND). The attractive photophysical characteristics of Cl2 /Br2 -DPND put them on the landscape as not only promising PDT agents but also as fluorescence probes. The present study is a stepping stone in the development of novel organic photosystems for synergistic photomedicinal applications." @default.
• W4310943023 created "2022-12-21" @default.
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• W4310943023 date "2023-01-04" @default.
• W4310943023 modified "2023-10-18" @default.
• W4310943023 title "Photophysical Insights of Halogenated Dipyrrolonaphthyridine‐Diones as Potential Photodynamic Therapy Agents ^†" @default.
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• W4310943023 doi "https://doi.org/10.1111/php.13757" @default.
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