Phosphorescent and Test Strips Detection Properties of ClO− Probes Based on Iridium(III) Complexes with Pivaloyl Unit as Recognition Site

Abstract

AbstractThree green phosphorescent Iridium(III) complex‐based probes with different ligands (Cl− (Ir‐1), NCS− (Ir‐2) and NCO− (Ir‐3)) had been developed to detect hypochlorite (ClO−) using pivaloyl group as recognition site. The introduction of strong field ligand NCS and NCO caused an increase of quantum yields and phosphorescent lifetime both in solid and solution states. All the three probes could selectively and rapidly detect ClO− through the changes in UV‐visible and phosphorescence spectra. Upon addition of ClO− to the solution of probes, green phosphorescent color of probes displayed obvious quench. Meanwhile, using a portable UV lamp, test strips which were pre‐immersed with the above‐mentioned probes could achieve easy detection of ClO−. The sensing process was confirmed by NMR, IR and ESI‐MS.