April 2010 issue
Cover illustration: 4,4-Difluoro-1,3,5,7-tetramethyl-8-pentafluorophenyl-4-bora-3a,4a-diaza-s-indacene is a member of a family of boron-dipyrromethene (BODIPY) dyes. These are renowned as excellent fluorophores, exhibiting high molar extinction coefficients and high fluorescence quantum yields. They have been of recent interest with regard to the design of fluorescence labels and biomolecular sensors. The molecule lies on a mirror plane with the tetrafluorophenyl ring orthogonal to the BODIPY ring plane. The B atom adopts a slightly distorted tetrahedral conformation. See XiaoFeng Zhou [Acta Cryst. (2010). E66, o757].