Design of novel copper(II) and zinc(II) coordination polymers based on the 4′-functionalized terpyridines

Synthesis, Hirshfeld surface analysis, luminescence and thermal properties of three first‐row transition metal complexes containing 4′‐hydroxy‐2,2′:6′,2″‐terpyridine: Application for preparation of nano metal oxides

“…The axial positions were occupied by the outer nitrogen atoms of tpyO (N21 and N31) while the middle nitrogen atom from terpyridine motif and the oxygen atom from acetate as well as the oxygen atom from aqua occupied the equatorial positions (ZnN 3 O 2 ). We have already reported that the reaction of zinc(II) acetate with tpyOH in a methanol–CH 2 Cl 2 solution and crystallization from methanol–hexane led to the synthesis of a coordination polymer of [Zn(tpyO)(η 1 ‐OCOCH 3 )] in which zinc is penta‐coordinated in a square pyramidal geometry by three nitrogen atoms from tridentate tpyO, monodentate acetate group and an oxygen from the neighbouring tpyO . Therefore, it can be seen that the solvent‐induced coordination environment of Zn allows the formation of various coordination polymers.…”

“…There are several reports of the preparation and characterization of terpyridyl complexes of transition metals, especially 3d metal compounds; they usually exist as 1:1 or 1:2 metal:tpy. The mono‐terpyridine complexes always contain other monodentate or bidentate ligands . The most common mode of terpyridine ligand is chelation via N 3 motif and the meridional binding mode in a 1:1 or 1:2 ratio of metal to ligand.…”

“…Hydrogen bonding is one of the most popular approaches exploited for controlling the solid‐state behaviour of supramolecular materials. 4′‐Hydroxy‐2,2′:6′,2″‐terpyridine (tpyOH) is well studied among terpyridine derivatives since the OH moiety can act as a hydrogen bond donor; tpyOH has the ability to act as a chelating ligand and also it can further bridge metal sites through the deprotonation of the hydroxyl group, resulting in the formation of stable metal–organic coordination complexes …”

“…The X-ray crystal structure of 1 reveals that Mn(II) is penta-coordinated by three nitrogen atoms from tpyOH and two Cl − in a slightly distorted trigonal bipyramidal geometry. Complex 2 was also prepared by the reaction of nickel(II) chloride with tpyOH in a methanolic medium in the presence of NH 4 PF 6 . Notably, the complex [Ni(tpyOH)(tpyO)]PF 6 (3), obtained during the crystallization of 2 from dichloromethane, was characterized using X-ray crystallography which shows that six nitrogen atoms from terpyridine ligands occupy the coordination sites around the Ni(II) centre in a distorted octahedral geometry with four longer bonds and two shorter Ni N bonds.…”

Chiral zinc(II) and cadmium(II) complexes with a dihydrophenanthroline ligand bearing (–)-α-pinene fragments: Synthesis, crystal structures and photophysical properties

“…Luminescent zinc(II) and cadmium(II) complexes are of interest as promising fluorescent materials and sensors [21][22][23][24][25][26][27][28][29][30][31][32]. We have recently reported zinc(II) and cadmium(II) chloride complexes with an achiral pyridophenazine ligand prepared by functionalization of chiral pinopyridine [33].…”