A dual-emissive metal–organic framework was synthesized, and it represents the first MOF-based fluorescent ratiometric sensor for the turn-on sensing of hypochlorite with high efficiency and specificity.
By utilizing laboratory-guided evolution, we have converted the fluorescent proton-pumping rhodopsin GR from Gloeobacter violaceus into GR1, a red-shifted, turn-on fluorescent sensor for chloride.
A new calixpyridinium-based light-responsive host–guest recognition motif was found in this work. This host–guest recognition motif was further discovered to be applied as a selective turn-on fluorescent sensor for lysine.