A pyrene-functionalized MOF (MIL-53-L) (MIL = Matériaux de I’Institut Lavoisier) as an efficient fluorescent chemosensor for Cu2+ detection.
Terephthalic acid moiety as framework linker of MOF, imine moiety for Cu2+ detection by binding sites, and pyrene moiety for signal conversion.
A transformation of configuration with the dangled pyrene groups from monomer of free H2L to excimer in MIL-53-L under a confinement effect.
Detecting Cu2+ from another change of dangled pyrene groups from stacked excimer state to quenched excimer state.