Structure dependence of the photogeneration of thionaphthol triplets

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Abstract

In contrast to our findings on thiophenol and its substituted derivatives, thionaphthol triplet formation was found after UV photo-excitation in various solvents. The T1-Tn absorption spectra were characterized by a pronounced absorption band with λmax = 430-470 nm. The triplet states reactivity with triplet quenchers and their energy levels were determined. The triplet quantum yields were estimated to be 0.15 and 0.65 for 1-NpSH and 2-NpSH, respectively. The experimental results were interpreted by quantum calculations using the DFT B3LYP/6-311+G(d,p) method, which indicated that the small S1 - Tn=2,3 energy gap and different orbital configurations account for the direct triplet formation. © 2009 Elsevier B.V. All rights reserved.

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Riyad, Y. M., Naumov, S., Hermann, R., Brede, O., & Abel, B. (2009). Structure dependence of the photogeneration of thionaphthol triplets. Chemical Physics Letters, 477(4–6), 290–297. https://doi.org/10.1016/j.cplett.2009.07.004

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