From red to near infra-red OLEDs: the remarkable effect of changing from X = -Cl to -NCS in a cyclometallated [Pt(N~^C~^N)X] complex {N~^C~^N = 5-mesityl-l,3-di-(2-pyridyl)benzene}

摘要

[PtL~6X] {X = Cl or NCS and L~6 = 5-mesityl-1,3-di(2-pyridyl)-benzene} display similar luminescence in solution but, in the solid state, the packing of the molecules is different, with short Pt… Pt interactions for X = NCS, leading to a red-shifted emission band. The effect has been used to generate OLEDs that emit squarely in the NIR region (855 nm).