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• W2028293871 startingPage "7140" @default.
• W2028293871 abstract "Free base stannyl porphyrins and free base porphyrin dimers have been successfully synthesized via copper-free Stille coupling in 21-67% yields. This approach provides an access to stannyl porphyrin synthons that were previously unavailable. Moreover, variation of the reaction conditions selectively provides access to either stannyl porphyrins or porphyrin dimers. Full (119/117)Sn NMR analysis was used for characterization of the stannyl porphyrins and detailed (119)Sn-(1)H-(13)C NMR analyses were carried out on a series of the starting tin reagents and the stannyl porphyrins. These investigations indicate that significant structural information can be gathered by use of commonly known NMR techniques. Photophysical properties of the novel porphyrins prepared including absorption, emission, and fluorescence lifetimes were investigated. The stannyl porphyrins emitted in the visible region, and in all cases large Stokes shifts were observed. The emission intensities of the stannyl porphyrins were 100-fold higher than those of the starting bromoporphyrins. Measured fluorescence lifetime (S(0)-->S(1)) of the stannyl and dimeric porphyrins were in the 7.7-12 ns region." @default.
• W2028293871 created "2016-06-24" @default.
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• W2028293871 date "2009-08-18" @default.
• W2028293871 modified "2023-09-27" @default.
• W2028293871 title "Synthesis of Stannyl Porphyrins and Porphyrin Dimers via Stille Coupling and Their ¹¹⁹Sn NMR and Fluorescence Properties" @default.
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• W2028293871 doi "https://doi.org/10.1021/jo901535c" @default.
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