Novel Coordination Polymers of Metal(II) Succinates with 4‐Aminopyridine: Synthesis, Spectroscopic, Thermal, and Fluorescent Properties

Abstract

Four novel divalent transitional metal succinates (suc) with 4‐aminopyridine (apy), [M(apy)2(H2O)2(μ‐suc)]n [M = Ni (1), Co (2)] and [M(apy)2(H2O)(suc)] [M = Cu (3), Zn (4)] were synthesized and characterized by elemental analyses, IR spectroscopy, and TG‐DTA analyses. The single‐crystal X‐ray analysis of 1 revealed that it crystallizes in the orthorhombic space group Pcab and that it is a 1D coordination polymer. The suc molecule acts as a bis‐monodentate bridging ligand whereas apy coordinates to the NiII ions only through its pyridine nitrogen atoms. The chains are connected by OH–O hydrogen bonds into 2D networks. Compound 4 emits intense fluorescence at 380 nm and intense violet fluorescence at 418 nm, upon excitation at 310 and 350 nm, respectively.

Supramolecular assemblies and magnetic behaviors of the M(II)/p-aminopyridine/malonate (M=Ni, Mn, Cu, Co) systems

“…To the best of our knowledge, compound 1 constitutes the most recent example of a series of one-dimensional coordination compounds based on bridging carboxylate groups and with two aminopyridine ligands completing the coordination sphere of the metal. Examples of bridging carboxylic ligands of this series are carbonate [28], formate [29], oxalate [30,31] and succinate [32]. Related compounds with general formula (apyH) 2 [M(l-mal) 2 (H 2 O) 2 ] [M 2+ @Ni 2+ (2), Co 2+ (3)] have already been described in the literature and are based on discrete units.…”