Gold Corroles as Near-IR Phosphors for Oxygen Sensing

The triplet state of gold­(III) corroles is exploited for optical oxygen sensing. We report intense phosphorescence for gold­(III) corroles in the near-IR, an optical window that is ideal for tissue transparency. Moreover, the triplet excited-state emission exhibits significant changes in intensity and lifetime over the 0–160 Torr O₂ pressure range. This renders these compounds sensitive at biologically relevant pressures and overcomes the spectral limitations of palladium and platinum porphyrins for oxygen sensing in biology.