Syntheses, Crystal Structures, and Luminescence Properties of Co(II), Ni(II) and Zn(II) Complexes with 4′-(4-(Imidazol-1-Yl)phenyl)-2,2′:6′,2″-Terpyridine

Abstract

Three coordination complexes [Co(Imphtpy)₂]Cl₂ · CHCl₃ · 3H₂O (I), [Ni(Imphtpy)₂]Cl₂ · CHCl₃ · C₂H₅OH (II) and [Zn(Imphtpy)]Cl₂ (III) (Imphtpy = 4'-(4-(imidazol-1-yl)phenyl)2,2':6',2″-terpyridine) have been synthesized and characterized by IR, elemental analysis and X-ray single crystal diffraction (СIF files CCDC nos. 1012055 (I), 1011708 (II), 1011709 (III)). Complexes I and II are isomorphism except for some solvent molecules. In the crystal, both face-to-face interactions between pyridyl ring, imidazole rings and phenyl rings and hydrogen bonds facilitate the construction of 3D networks. There are no hydrogen bonds in III and the packing of discrete neutral molecules were ascribed to face-to-face interactions and van der Waals forces. The luminescence properties of three complexes have been investigated in the solid state at room temperature.