Organic cages with long-wavelength emission and ratiometric signal are pivotal but still challenging for their sensing application. Probes often suffer from single signal and poor water solubility, which are detrimental to hypochlorous acid (HClO) sensing in aqueous solution. Here, we report the fabrication of organic cages with long-wavelength dual emission for ratiometric fluorescent sensing of HClO. The nanosized organic cages (OCs-1 and OCs-2, derived from the reaction of 1,3,5-tris(aminomethyl)benzene) and 2- or 4-hydroxyisophthalaldehyde) showed robust stability across varying pH. Both O...
