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- W2037103337 abstract "The excited state properties of the title compounds and their Zn2+ derivatives, determined by fluorescence and photoexcited tripled ESR methods, are reported. Fluorescence spectral studies indicate that the basket handle porphyrins are less fluorescent than the parent meso-tetraphenyl porphyrin (H2TPP). The combined effects of intersystem crossing and internal conversion account for this difference. Estimated excited state potentials suggest that the cross trans linked isomer (PSI) is a better electron donor in the first singlet excited state. Zero-field splitting parameters D and E of the three isomers evaluated from photoexcited triplet ESR show small but significant differences attributed to distortion of the porphyrin plane caused by introduction of a short bridging group. The electron spin polarization (ESP) pattern remains the same as in H2TPP, indicating the usual spin—orbit coupling mechanism for intersystem crossing." @default.
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- W2037103337 date "1993-01-01" @default.
- W2037103337 modified "2023-09-27" @default.
- W2037103337 title "Short-chain basket handle porphyrins: Singlet and triplet excited state properties" @default.
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