A large perturbation on electronic and photophysical properties of Ir(III) carbene complexes caused by the variation of N-substitution in N,N′-heteroaromatic ligands

- The absorption spectra are obviously affected by the modification of N^N′ ligand.
- The phosphorescence properties have an apparent response to the solvent effects.
- The emissive state is controlled by N^N′ ligand no matter with one/two N^N′ ligand.
- The diazolyl-pyridyl-based N^N′ ligand is beneficial for efficient OLEDs emitters.