Phenylbenzothiazole-Based Platinum(II) and Diplatinum(II) and (III) Complexes with Pyrazolate Groups: Optical Properties and Photocatalysis.

Based on 2-phenylbenzothiazole (pbt) and 2-(4-dimethylaminophenyl)benzothiazole (MeN-pbt), mononuclear [Pt(pbt)(R'-pzH)]PF (R'-pzH = pzH , 3,5-MepzH , 3,5-PrpzH ) and diplatinum (Pt-Pt) [Pt(pbt)(μ-R'pz)] (R'-pz = pz , 3,5-Mepz , 3,5-Prpz ) and [Pt(MeN-pbt)(μ-pz)] () complexes have been prepared. In the presence of sunlight, and evolve, in CHCl solution, to form the Pt-Pt complexes [Pt(R-pbt)(μ-pz)Cl] (R = H , NMe ). Experimental and computational studies reveal the negligible influence of the pyrazole or pyrazolate ligands on the optical properties of - and ,, which exhibit a typical IL/MLCT emission, whereas in the emission has some MMLCT contribution.

Phosphorescent 2-phenylbenzothiazole Pt bis-cyclometalated complexes with phenanthroline-based ligands.

We describe a family of dicationic heteroleptic complexes of the type [Pt(pbt)(N^N)]Q, bearing two cyclometalating 2-phenylbenzothiazole (pbt) groups and a N^N phenanthroline-based ligand [N^N = 1,10-phenanthroline (phen) 4, pyrazino[2,3-][1,10]-phenanthroline (pyraphen) 5, 5-amine-1,10-phenanthroline (NH-phen) 6], with two different counteranions (Q = CFCO and PF). Complexes 4-6-PF6 and 4-6-CF3CO2 were obtained through ligand substitution from -[Pt(pbt)Cl] 2 and -[Pt(pbt)(OCOF)] 3, respectively. The molecular structures of 2, 3 and 4-PF6 and the photophysical and electrochemical properties of all complexes were studied in detail.