Exploiting the benefit of S0 → T1 excitation in triplet–triplet annihilation upconversion to attain large anti-stokes shifts: tuning the triplet state lifetime of a tris(2,2′-bipyridine) osmium(ii) complex

The triplet state lifetime of an Os(bpy)₃ complex showing strong S₀ → T₁ absorption was prolonged 30-fold by attaching Bodipy chromophores.