Carborane enhanced two-photon absorption of tribranched fluorophores for fluorescence microscopy imaging.

Carborane-incorporated (at both carbon and boron sites) tribranched fluorophores were efficiently prepared. significantly improves the fluorescence quantum yield. exhibits the largest two-photon absorption among the known carborane-based derivatives and has been successfully applied in two-photon fluorescence 2D & 3D bioimaging.