LAUSR

Inserting metal ions into the porphyrin ring is one of the primary strategies to enhance the properties of porphyrin‐based metal–organic frameworks (MOFs). However, the straightforward, rapid, and energy‐efficient synthesis of porphyrin‐based MOFs with high metallization for the porphyrin ring remains challenging. Herein, a solution anode glow discharge (SAGD) microplasma is presented for the one‐step synthesis of scandium‐metalloporphyrin frameworks (ScMPFs). The substantial number of electrons provided by the plasma–liquid interface not only accelerated the rapid nucleation and growth of MOFs but also promoted the incorporation of scandium (Sc3+), which has a small ionic radius and strong coordination ability, into the N atoms in the porphyrin ring, and enhanced the metallization of MOFs. The sufficient Sc3+ in frameworks inhibited the recombination of electron–hole pairs, resulting in boosted reactive oxygen species yield and a low fluorescence background of MOFs. Consequently, the ScMPFs are employed for the sensitive and rapid detection of F− in water with a detection limit of 0.24 µm and for efficient bacteriostasis at low doses (10 µg mL−1, 12 mW cm−2 light irradiation for 10 min).