Inclusion complex of a new probe LC shows fluorescence quenching (∼ 80% at 588.5 nm) with Cu²⁺ while LCCu²⁺ ensemble exhibits fluorescence enhancement (∼84% at 562.5 nm) with Cr₂O₇²⁻.

The detection limits of fluorescent chemosensor LC to Cu²⁺ and LCCu²⁺ complex to Cr₂O₇²⁻ anion were estimated to be 10 nM and 0.8 nM, respectively.

The “On-Off-On” switching behavior of LC in the presence of Cu²⁺ and Cr₂O₇²⁻ ions mimic the function of a sequential logic circuit at molecular level.

The fluorescent chemosensor LC can be utilized in live cell imaging of Cu²⁺ and Cr₂O₇²⁻ ions respectively.