Considering the porous structure of luminescent chiral POPs, their potential applications as fluorescent sensors were further studied with picric acid (PA) selected as the interested analyst. Along with the addition of PAs into the suspension of PRBT and PSBT in MeOH, the fluorescence intensity of chiral POPs gradually decreased with the increasing concentration of PA (Figure ). In addition, the PL titrations were also carried out for other nitroaromatics and analogues (Figure -S56), including pnitrophenol (p-NP), 2,4-dinitrotoluene (DNT), nitrobenzene (NB), and phenol (PN). By contrast, these analogues displayed remarkably lower quenching capability relative to PA (Figure ).