Improvement of (bipy)Pt(XR)2 (X = O, S) type photosensitizers by covalent dye attachment

Zusammenfassung

Irradiation into the dye-based absorption band of complexes (tBu2bipy)Pt(SR)2 and (tBu2bipy)Pt(OR)2 where R denotes a coumarine-based thiolate and alkoxolate substituent populates the same excited triplet state as is obtained by excitation into the much weaker (RX)2Pt→tBu2bipy (X = O, S) charge-transfer band. This paves the way toward more efficient photosensitizers.