Tuning the π-bridge of quadrupolar triarylborane chromophores for one- and two-photon excited fluorescence imaging of lysosomes in live cells

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Abstract
The tetracationic diketopyrrolopyrrole compound 5M exhibits a σ2 value of 4560 GM at 740 nm.
Funding Information
  • Deutsche Forschungsgemeinschaft (GRK 2112)
  • Julius-Maximilians-Universität Würzburg
  • Japan Society for the Promotion of Science (18H05261, JP16H06280 (Advanced Bioimaging Support), KAKENHI grant 18H03909)

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