The dependence of oxygen sensitivity on the molecular structures of Ir(iii) complexes and their application for photostable and reversible luminescent oxygen sensing.

ABSTRACT: Three Ir(iii) complexes IrC1, IrC2, and IrC3 substituted with 4-(diphenylamino)phenyl (TPA), 4-(9H-carbazol-9-yl)phenyl (Cz1), and 9-phenyl-9H-carbazol-3-yl (Cz2) moieties were prepared and fully characterized as phosphorescent emitters. In comparison with Ir(ppy)₃, introduction of TPA, Cz1, and Cz2 moieties strongly improved the oxygen sensitivities of IrC1-IrC3. Short-decayed IrC1 with I ₀/I ₁₀₀ of 168.6 and K ^app _SV of 202.2 bar^-1 in THF exhibited the highest sensitivity for oxygen. TPA and Cz moieties caused remarkable collision radius variations of the Ir(iii) complexes with 2.13 ± 0.08 for σ _IrC1/σ _Ir(ppy)3 , 1.24 ± 0.06 for σ

SUBMITTER: Xing Y 

PROVIDER: S-EPMC9064210 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature