Through-space charge-transfer emitting biphenyls containing a boryl and an amino group at the o,o'-positions

Org Lett. 2011 Sep 16;13(18):4830-3. doi: 10.1021/ol201909r. Epub 2011 Aug 17.

Abstract

A new class of organoboron compounds containing a boryl and an amino group at the o,o'-positions of biphenyls display bright through-space intramolecular charge transfer fluorescence owing to the close contact between the boryl and the amino groups. Binding of the fluoride ions results in the remarkable blue shift and color change of the fluorescence, enabling colorimetric and ratiometric fluoride ion sensing.