Rigidly linking cyclometallated Ir(III) and Pt(II) centres : an efficient approach to strongly absorbing and highly phosphorescent red emitters.

The synthesis and photophysical properties of an unprecedented tetranuclear complex are described, in which a fac-tris-cyclometallated Ir(III) centre is rigidly connected to three cyclometallated Pt(II) centres. The complex absorbs strongly up to ∼600 nm and emits red light with unusually high efficiency