A series of new Ir(III) complexes incorporating 3-(2-benzothiazolyl)-7-(diethylamino)coumarin (coumarin 6) and ethynylpyrene (EP) functionalised 1,10-phenanthroline (phen) were developed. [Ir(III)(coumarin 6) (3-EP-phen)](PF ) (Ir-3) proved to be the most promising material in triplet photosensitising applications. Highly absorbing at ? = 486 nm (? = 1.31 × 10 M? cm? ) it exhibits high upconversion and singlet oxygen quantum yields (? = 27.5%, ? = 81.5%) and an exemplary upconversion capability (?
