One-Dimensional Polymers Constructed with Paddle-Wheel Dinuclear Copper(II) Bridged by 4,4′-Bipyridine

Abstract

The coordination compound {[Cu(NAP) 2 ] (4,4 0 -bpy) 1/2 }ÁDMF (1) was prepared by the reaction of a-naphthoic acid, 4,4 0 -bipyridine and Copper(II) acetate hydrate in basic solution, and was fully characterized by X-ray diffraction, element analysis, FTIR and TG analysis. Crystals of compound 1 belongs to the monoclinic crystal system, space group C2/c; a = 17.460 (4) Å , b = 13.928(3) Å , c = 21.240(4) Å , b = 93.83(3), V = 5153.7 Å 3 , Z = 8. The structure analyses of 1 show a one-dimensional chain structure where the binuclear structural units [Cu 2 (NAP) 4 ] are bridged by 4,4 0 -bipyridine molecules. Furthermore, the 1D chains are assembled to form 2D supramolecular sheet by intermolecular pÁÁÁp stacking interactions between naphthalene rings.

Structure and Magnetic Properties of a 1D Alternating Cu(II) Monomer―Paddlewheel Chain

“…Perec and colleagues [12] performed a survey of the Cambridge Structural Database, and in 2010 reported three different motifs by which Cu(II) paddlewheels bridge themselves (without the requirement for any additional co-ligands) to generate 1D chains: an in-plane flat ribbon motif, and less commonly, two motifs of alternating in-plane and perpendicular bridging to adjacent carboxylates. Alternatively, the water could be replaced by bridging heteroligands as reported, for example, for α-naphthoic acid [13] and 3-thiopheneacetate [14] paddlewheels with bridging 4,4 -bipyridine. These materials have a variety of uses, and one report has even demonstrated the potential use of pyridazine-bridged dicopper(II) tetracarboxylate 1D chains for gas adsorption [15].…”

“…motifs of alternating in-plane and perpendicular bridging to adjacent carboxylates. Alternatively, the water could be replaced by bridging heteroligands as reported, for example, for α-naphthoic acid [13] and 3-thiopheneacetate [14] paddlewheels with bridging 4,4′-bipyridine. These materials have a variety of uses, and one report has even demonstrated the potential use of pyridazine-bridged dicopper(II) tetracarboxylate 1D chains for gas adsorption [15].…”

A Mn(II) Coordination Polymer with Sulfate and trans-1,2-Bis(4- pyridyl)ethylene Bridges: Synthesis, Structure, Magnetic and Ferroelectric Properties

“…In recent years, some examples of polymeric species containing both SO 2− 4 anions and bpe ligands have been reported, including one-dimensional, two-dimensional and three-dimensional structures [14 -16]. We are currently searching for novel coordination polymers based on bi-functional N-containing ligands [17,18]. In the present contribution, we report the synthesis and characterization of a new mixed sulfate-and trans-1,2-bis(4-pyridyl)ethane-bridged Mn(II) polymer, Mn(H 2 O) 2 (bpe)(SO 4 )]·H 2 O.…”