Dye-insertion dynamic breathing MOF as dual-emission platform for antibiotics detection and logic molecular operation

Antibiotic pollution as a hot topic of global concern is greatly sought after due to the adverse effect on ecosystems and human health stemming from the excessive use and deficient management. Achieving detection of antibiotics residues in water is extremely crucial but remains challenging. Herein, four metal-organic frameworks 1–4 with different luminescent behaviors were demonstrated by variation of the systematic rigidity and assemble form. To fabricate the solid dual-emission probe, the gust dye 4-(4-diethylaminostyryl)-1-methylpyridinium (DEASM) is successfully encapsulated into a non-porous flexible MOF 4 ascribed to the dynamic breathing effect. The resulting composite displays the dual-emission behavior with the color linearly tuned from green to red and ratiometric luminescent response to pH with controllable sensitivity, supported by dimensionality dependent energy transfer. Furthermore, 4⊃DEASM exhibits sensitive and selective sensing performances towards nitrofurazone and could be integrated into a logic operation. Thus, our study may bring new perspective for the design of dye encapsulated MOF dual-emission ratiometric sensor to monitor antibiotic in water.