Ir(iii) complex-based phosphorescence and electrochemiluminescence chemodosimetric probes for Hg(ii) ions with high selectivity and sensitivity. Issue 11 (15th February 2018)

• Record Type: Journal Article
• Authors: Rhee, Hayoung; Kim, Taemin; Hong, Jong-In
• Is Part Of: Dalton transactions. Volume 47:Issue 11(2018)
• Page Start: 3803
• Page End: 3810
• Publication Date: 2018-02-15
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c8dt00309b
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Acetylacetonato Ir(iii ) complexes showed turn-on, turn-off, or ratiometric responses in both phosphorescence and electrochemiluminescence channels. Abstract : Mercury, one of the most prevalent toxic metal elements, poses severe risks to human health and the environment. Several molecular probes have been developed for colorimetric and fluorometric detection of Hg(ii ) ions. Nevertheless, development of a rapid, selective, and sensitive probe for Hg(ii ) ions remains important. Herein, we report three Ir(iii ) complex-based phosphorescence and electrochemiluminescence chemodosimeters for the selective detection of Hg(ii ) ions. The acetylacetonate ancillary ligand of probe1 reacts selectively with the Hg(ii ) ion, inducing phosphorescence enhancement with a concomitant blue-shift. Meanwhile, the Hg(ii ) ion selectively quenches the phosphorescence of probe2 . Probes1 and2 showed low detection limits (LOD) of 73 and 160 nM, respectively. In addition, the Hg(ii ) ion level was successfully monitored by the electrochemiluminescence decrement of probe9 with a good linear correlation between 0 and 40 μM, with a detection limit of 170 pM.