Synthesis, crystal structure and photophysical properties of chlorido[2-(2′,6′-difluoro-2,3′-bipyridin-6-yl-κN1)-6-(pyridin-2-yloxy-κN)phenyl-κC1]platinum(II)

Abstract

The title compound, [Pt(C21H12F2N3O)Cl], crystallizes with two crystallographically independent molecules (A and B) in the asymmetric unit, which adopt similar conformations. The PtII atoms in both molecules adopt distorted square-planar geometries, coordinated by one C and two N atoms from the tridentate 2′,6′-difluoro-6-[3-(pyridin-2-yloxy)phenyl]-2,3′-bipyridine ligand and a chloride anion: the C and Cl atoms are trans. In the crystal, C—H...Cl/F hydrogen bonds, F...π and weak π–π stacking interactions between adjacent A and B molecules and between pairs of inversion-related B molecules lead to the formation of a two-dimensional supramolecular network lying parallel to the ab plane. The sheets are stacked along the c-axis direction and linked by F...π and weak π–π stacking interactions between pairs of inversion-related A molecules, forming a three-dimensional supramolecular network. The photoluminescence quantum efficiency of the title compound in the blue–green region of the visible region (λmax = 517 and 544 nm) is estimated to be ∼0.2–0.3, indicating that the title compound could be a suitable candidate as the emitting material in organic light-emitting diode (OLED) applications.

Keywords

• crystal structure
• 2,3′-bipyridine
• platinum compound
• luminescence
• oled