Analytical Sciences

Abstract − Analytical Sciences, 36(4), 435 (2020).

A Novel Ratiometric Cationic Iridium(III) Complex Phosphorescent Probe for Hydrogen Peroxide
Xuanxian WU and Qi LIN
College of Ocean, Minjiang University, Fuzhou, 350116, P. R. China
A novel cationic iridium(III) complex phosphorescent probe (Ir-BE) containing aromatic boronate ester moiety as recognition unit was designed and synthesized. The probe exhibits ratiometric emission variations (I490/I550) with the color change from yellow to green only toward H2O2 with a broad pH range of 4 – 13. Different from other aromatic boronate-based probes, Ir-BE possesses larger Stokes shift (320 nm) and exhibits good linear correlation (R2 = 0.998) between the emission ratio (I490/I550) and the H2O2 concentration in a range of 0 – 300 μM. The detection limit was as low as 0.21 μM. Furthermore, the real water sample studied further proved Ir-BE has excellent selectivity for the quantitative detection of H2O2.