AIEgen-functionalized metal–organic gel as a bifunctional platform for efficient adsorption and portable sensing of gaseous iodine

Herein, we proposed a novel metal-organic gel (YTU-G-1) for efficient adsorption and portable sensing of gaseous iodine. YTU-G-1 exhibits an unprecedentedly high detection sensitivity (K_SV = 2.21 × 10⁶ L mol^-1) and an extremely low limit of detection (LOD) down to the pmol level (481 pmol L^-1). YTU-G-1 also shows a marked iodine adsorption capacity of 1.398 g g^-1. A wearable membrane was successfully fabricated via the electrospinning technique, which exhibits excellent skin-compatibility and serves as a portable tool for sensitive response to potential on-site nuclear emergencies.