Synthesis, crystal structure and photophysical properties of chlorido[2-(2′,6′-difluoro-2,3′-bipyridin-6-yl-κ<i>N</i><SUP>1</SUP>)-6- (pyridin-2-yloxy-κ<i>N</i>)phenyl-κ<i>C</i><SUP>1</SUP>]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 Pt-II 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 center dot center dot center dot Cl/F hydrogen bonds, F center dot center dot center dot pi and weak pi-pi 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 center dot center dot center dot pi and weak pi-pi 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 (lambda(max) = 517 and 544 nm) is estimated to be similar to 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.