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- W4295031274 abstract "Trianionic polymethines of the A'-π-A-π-A-π-A' type comprising dioxaborine rings (A) and different electron-accepting end groups (A') have been synthesized. The obtained dyes absorb and emit light in the near-infrared region with remarkably high molar attenuation coefficients (ϵ up to 495 000 M-1 cm-1 in DMF) and fluorescence quantum yields (Φf up to 0.73 in DMF). Thus, the novel trianionic dyes stand among the brightest individual fluorophores known to date - with a magnitude of fluorescence brightness (ϵ⋅Φf ) of 313 000 M-1 cm-1 in DMF. The synthesized dyes demonstrate a minor negative solvatochromism and small Stokes shifts. X-ray data reveal the nearly planar geometry of the trianionic chromophore. All the obtained compounds are stable in the solid state and in a solution, although the relative stability is much higher in polar aprotic than in protic solvents." @default.
- W4295031274 created "2022-09-09" @default.
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- W4295031274 date "2022-10-19" @default.
- W4295031274 modified "2023-10-16" @default.
- W4295031274 title "Trianionic 1,3,2‐Dioxaborine‐Containing Polymethines: Bright Near‐Infrared Fluorophores" @default.
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- W4295031274 doi "https://doi.org/10.1002/chem.202202168" @default.
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