Highly Selective Two-Photon Chemosensors for Fluoride Derived from Organic Boranes

Three organoboron compounds are shown to be two-photon fluorescent sensors for fluoride anion with high sensitivity and selectivity. The
recognition mechanism is attributed to the unique steric structure of the bulky dimesitylboryl group and the Lewis acid−base interaction
between trivalent boron atom and fluoride anion.