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

Abstract

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.