Amplified Luminescence Quenching of Phosphorescent Metal–Organic Frameworks

Amplified luminescence quenching has been demonstrated in metal–organic frameworks (MOFs) composed of Ru­(II)-bpy building blocks with long-lived, largely triplet metal-to-ligand charge-transfer excited states. Strong non-covalent interactions between the MOF surface and cationic quencher molecules coupled with rapid energy transfer through the MOF microcrystal facilitates amplified quenching with a 7000-fold enhancement of the Stern–Völmer quenching constant for methylene blue compared to a model complex.