Near‐IR Phosphorescent Ruthenium(II) and Iridium(III) Perylene Bisimide Metal Complexes |
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| Authors: | Marcus Schulze Dr. Andreas Steffen Prof. Dr. Frank Würthner |
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| Affiliation: | 1. Universit?t Würzburg, Institut für Organische Chemie and Center for Nanosystems Chemistry, Am Hubland, 97074 Würzburg (Germany);2. Universit?t Würzburg, Institut für Anorganische Chemie, Am Hubland, 97074 Würzburg (Germany) |
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| Abstract: | The phosphorescence emission of perylene bisimide derivatives has been rarely reported. Two novel ruthenium(II) and iridium(III) complexes of an azabenz‐annulated perylene bisimide (ab‐PBI), [Ru(bpy)2(ab‐PBI)][PF6]2 1 and [Cp*Ir(ab‐PBI)Cl]PF6 2 are now presented that both show NIR phosphorescence between 750–1000 nm in solution at room temperature. For an NIR emitter, the ruthenium complex 1 displays an unusually high quantum yield (Φp) of 11 % with a lifetime (τp) of 4.2 μs, while iridium complex 2 exhibits Φp<1 % and τp=33 μs. 1 and 2 are the first PBI‐metal complexes in which the spin–orbit coupling is strong enough to facilitate not only the Sn→Tn intersystem crossing of the PBI dye, but also the radiative T1→S0 transition, that is, phosphorescence. |
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| Keywords: | dyes/pigments iridium perylene bisimides phosphorescence ruthenium |
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