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Keywords:

  • 3D optical section;
  • cell imaging;
  • fluorescent probes;
  • selective staining;
  • structure–activity relationships
Thumbnail image of graphical abstract

Dyes for living cells: Carbazole-based cyanine probes exhibit excellent properties such as subcellular staining selectivity, large two-photon absorption cross sections, enhanced fluorescence when in their subcellular targets, and low toxicity. They provide a basis for nonlinear high-resolution 3D imaging of subcellular structures, and may have future roles in drug delivery and investigating molecule transport within living cells.