π-conjugated anthracene-based metal-organic frameworks for efficient antibiotics detection

A new 2D Cd-MOF with the formula [Cd(L)(0.5)(5-NO2-BDC)center dot DMF] (CUST-536) was constructed by biligand strategy of pi conjugated anthracene group (9,10-bis(N-benzimidazolyl)-anthracene, L) and carboxyl ligand 5-nitroisophthalate (5-NO2-BDC) and cadmium ions. The systematic characterization of CUST-536 was conducted by single crystal X-ray diffraction, PXRD, TG, IR and luminescent tests. CUST-536 reveals quenching response to furacillin (NZF) in the detection of antibiotics. CUST-536 adopts the objective development prospects as a fluorescent sensor due to excellent high selectivity, anti-interference as well as recyclability. Finally, the luminescent quenching mechanism is studied in detail through experiments and theoretical calculations, which provides the conditions for detecting hazardous substances in the environment.