A multi-responsive chemosensor for highly sensitive and selective detection of Fe3+, Cu2+, Cr2O72− and nitrobenzene based on a luminescent lanthanide metal–organic framework

Six Ln-MOFs have been synthesized. Eu-MOF behaves a multi-responsive luminescent chemosensor toward Fe³⁺, Cu²⁺, Cr₂O₇²⁻ and nitrobenzene with high sensitivity, selectivity and anti-interference ability. Sensing mechanisms are discussed in detail.