Luminescent palladium complexes containing thioamide-based SCS pincer ligands

Thioamide-based tridentate ligands, 1,3-benzenedicarbothioamides (1a–c), were used to afford pincer palladium(II) complexes (Pd(1–H)Cl, 2a–c) with η3-S,C,S type coordination. The complexes exhibit strong emission in a glassy frozen state as well as in the solid state. The decay lifetime of the emission from the complexes is in a range of 8–9 × 10−5 s, which is indicative of phosphorescent emission.