Difunctional Zn-based metal–organic frameworks: chemical conversion of CO2 and luminescence recognition for secnidazole

Abstract

A water-stable anion Zn-based MOF {[H₂N(CH₃)₂]₃[Zn₃(BTB)₂(5-atz)₃]·3EtOH·3H₂O·3DMF}_n (1) (H₃BTB = 1,3,5-tris(4-carboxyphenyl)benzene, 5-atz = 5-amino-1H-tetrazole) has been synthesized and structurally characterized, presenting a robust two-fold interpenetrated framework with high thermal stability and excellent solvent stability. Importantly, compound 1 as a difunctional Zn-Based MOF not only can sensitively and selectively detect secnidazole (SNZ) in aqueous solutions with a low detection limit of 0.75 ppm but also can catalyze the chemical conversion of CO₂ with aziridines into high-valued chemicals, displaying excellent regenerability. This work opens up a new avenue for the preparation of difunctional MOF-based luminescent sensors and heterogeneous catalysts.