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- Title
Near-IR Phosphorescent Ruthenium(II) and Iridium(III) Perylene Bisimide Metal Complexes.
- Authors
Schulze, Marcus; Steffen, Andreas; Würthner, Frank
- 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.
- Subjects
PERYLENE derivatives; RUTHENIUM compound derivatives; BISIMIDES; NEAR infrared spectroscopy; IRIDIUM compounds; PHOSPHORESCENCE; SPIN-orbit interactions
- Publication
Angewandte Chemie, 2015, Vol 127, Issue 5, p1590
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201410437