The mer complexes exhibit moderate FPL of 41-49% in MeCN, while the fac complexes show lower FPL values of 30-32%. This is unusual behaviour, with Ir(C^C)3 complexes normally showing similar FPL for both fac/mer isomers, such as is the case for Ir(pmp)3, or where the fac isomer has a higher FPL, such as the case for fac-Ir(pmpz)3. The emission lifetimes are tPL > 2 μs; relatively slower than that of mer-Ir(tfpmi)3,which shows biexponential decay kinetics [tPL = 0.70 μs (48%) and 1.82 μs (52%)].