Electrochemiluminescent chemodosimetric probes?for sulfide based on cyclometalated Ir(III) complexes

摘要

We developed two electrochemiluminescent probes (1, 2) for sulfide (S2?), based on cyclometalated Ir(III) complexes. Addition of sulfide anions greatly increased the ECL signal of probes by cleaving a PET quencher moiety from probe ligands. Probe 2 showed a high turn-on ratio of ECL and good selectivity for sulfide anions over various anions and biothiols.