Near-IR Phosphorescence of Iridium(III) Corroles at Ambient Temperature

Abstract

The photophysical properties of Ir(III) corroles differ from those of phosphorescent porphyrin complexes, cyclometalated and polyimine Ir(III) compounds, and other luminescent metallocorroles. Ir(III) corrole phosphorescence is observed at ambient temperature at wavelengths much longer (>800 nm) than those of most Ir(III) phosphors. The solvatochromic behavior of Ir(III)-corrole Soret and Q absorption bands suggests that the lowest singlet excited states (S2 and S1) are substantially more polar than the ground state.

Coordination chemistry of corroles with focus on main group elements

“…Their excited state lifetime is about 30 ms at 77 K, while the hexabrominated complex decayed ten times more quickly, indicating a much faster inter-system crossing process due to the heavy atom effect. Interestingly, iridium(III) corroles are phosphorescent even at ambient temperature with emission of 788-795 nm and ␤-pyrrole bromination induced a red shift without a reduced lifetime [65].…”

Metal–Ligand Misfits: Facile Access to Rhenium–Oxo Corroles by Oxidative Metalation

“…[1] Recent efforts by ah andful of groups,i ncluding ours, have led to the synthesis of several such complexes,i ncluding Hf, [2] W, [3] Os, [4] Ir, [5] Pt, [6] and Au [7] corroles. Unsurprisingly,s ome of the syntheses are difficult and low-yielding.…”

“…[6] By contrast, Ir andO s corrolesa re comparatively easily obtained and also in reasonably good yields. [4,5] There are good reasons for seeking improveds ynthetic routes to the 5d metallocorroles. For example, gold corrolesh ave found applicationsi no rganic solar cells and the photodynamic therapy of cancer.…”

Cellular uptake and anticancer activity of carboxylated gallium corroles

“…Corroles have received a great deal of attention in recent years (10)(11)(12)(13), owing to dramatic advances in methods for their preparation (14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31). Of interest here is a gallium(III) complex, 1 [Ga(tpfc)] (32)(33)(34)(35), where tpfc represents the trianion of 5,10,15-tris(pentafluorophenyl)corrole [H 3 (tpfc)].…”