Chemistry - A European Journal
Chemistry - A European Journal
5 years ago

The Chameleonic Nature of Platinum(II) Imidazopyridine Complexes

The Chameleonic Nature of Platinum(II) Imidazopyridine Complexes
Johannes Soellner, Rebecca Pittkowski, Thomas Strassner, Piermaria Pinter
The synthesis and characterization of cyclometalated C^C* platinum(II) complexes with unique photophysical properties, aggregation induced enhancement of the quantum yields with a simultaneous decrease of phosphorescence lifetimes, is reported. Additionally, a change of emission color is induced by variation of the excitation wavelength. The aggregation behavior of these complexes is controlled by the steric demand of the substituents. The photophysical properties of these complexes are investigated through emission-excitation matrix analysis (EEM). The monomeric complexes are excellent room temperature phosphorescent blue emitters with emission maxima below 470 nm and quantum yields of up to 93 %. Imidazopyridine C^C* platinum(II) complexes show unique photophysical properties: aggregation induced enhancement of the quantum yields with simultaneous decrease of phosphorescence lifetimes. Additionally, a change of emission color is induced by variation of the excitation wavelength. The aggregation behavior is controlled by the steric demand of the substituents. The complexes are excellent room temperature phosphorescent blue emitters with emission maxima below 470 nm and quantum yields of up to 93 %.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/chem.201703908

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