Dual-response fluorescence sensing of HPO and CO using AJP filter paper based on a pH-stable Cd-based luminescent metal-organic framework

A new Cd II -based luminescent metal-organic framework (LMOF) with the formula {[Cd(BIBT)(NDC)]·solvents} n ( JXUST-32 , BIBT = 4,7-bi(1 H -imidazol-1-yl)benzo-[2,1,3]thiadiazole and H 2 NDC = 2,6-naphthalenedicarboxylic acid) was successfully synthesized by a solvothermal method. JXUST-32 shows a two-dimensional (4,4)-connected network and exhibits significant fluorescence red shift and slight enhancement for H 2 PO 4 − and CO 3 2− sensing with detection limits of 0.11 and 0.12 μM, respectively. In addition, JXUST-32 has good thermal stability, chemical stability and recyclability. Significantly, JXUST-32 represents a fluorescence red-shift dual response MOF sensor for H 2 PO 4 − and CO 3 2− detection and the analytes can be identified by the naked eye, aerosol jet printing filter paper, light-emitting diode beads and luminescent films. A Cd II -based MOF could be viewed as a fluorescence red-shifted dual-response sensor for H 2 PO 4 − and CO 3 2− , which can also be identified by aerosol jet print filter paper, light-emitting diode beads and luminescent films.