Structural diversity, magnetic properties and luminescence of Ni^II, Co^II and Zn^II coordination polymers derived from 3,3′-[(5-carboxy-1,3-phenylene)bis(oxy)]dibenzoic acid and 1,10-phenanthroline

Abstract

Three novel coordination polymers (CPs), namely poly[[di-μ-aqua-bis{μ4-3,3′-[(5-carboxylato-1,3-phenylene)bis(oxy)]dibenzoato-κ5 O 1:O 1′,O 3:O 5:O 5′}bis(1,10-phenanthroline-κ2 N,N′)trinickel(II)] dimethylformamide 1.5-solvate trihydrate], {[Ni3(C21H11O8)2(C12H8N2)2(H2O)2]·1.5C3H7NO·3H2O} n , (I), poly[[di-μ-aqua-bis{μ4-3,3′-[(5-carboxylato-1,3-phenylene)bis(oxy)]dibenzoato-κ5 O 1:O 1′,O 3:O 5:O 5′}bis(1,10-phenanthroline-κ2 N,N′)tricobalt(II)] diethylamine disolvate tetrahydrate], {[Co3(C21H11O8)2(C12H8N2)2(H2O)2]·2C2H7N·4H2O} n , (II), and catena-poly[[aqua(1,10-phenanthroline-κ2 N,N′)zinc(II)]-μ-5-(3-carboxyphenoxy)-3,3′-oxydibenzoato-κ2 O 1:O 3], [Zn(C21H12O8)(C12H8N2)(H2O)] n , (III), have been synthesized by the reaction of different metal ions (Ni2+, Co2+ and Zn2+), 3,3′-[(5-carboxy-1,3-phenylbis(oxy)]dibenzoic acid (H3cpboda) and 1,10-phenanthroline (phen) under solvothermal conditions. All the CPs were characterized by elemental analysis, single-crystal and powder X-ray diffraction, FT–IR spectroscopy and thermogravimetric analysis. Complexes (I) and (II) have isomorphous structures, featuring similar linear trinuclear structural units, in which the central NiII/CoII atom is located on an inversion centre with a slightly distorted octahedral [NiO6]/[CoO6] geometry. This comprises four carboxylate O-atom donors from two cpboda3− ligands and two O-atom donors from bridging water molecules. The terminal NiII/CoII groups are each connected to the central NiII/CoII cation through two μ1,3-carboxylate groups from two cpboda3− ligands and one water bridge, giving rise to linear trinuclear [M 3(μ2-H2O)2(RCOO)4] (M = Ni2+/Co2+) secondary building units (SBUs) and the SBUs develop two-dimensional-networks parallel to the (100) plane via cpboda3− ligands with new (32·4)2(32·83·9)2(34·42.82·94·103) topological structures. Zinc complex (III) displays one-dimensional coordination chains and the five-coordinated Zn atom forms a distorted square-pyramidal [ZnO3N2] geometry, which is completed by two carboxylate O-atom donors from two distinct Hcpboda2− ligands, one O atom from H2O and two N atoms from a chelating phen ligand. Magnetically, CP (I) shows weak ferromagnetic interactions involving the carboxylate groups, and bridging water molecules between the nickel(II) ions, and CP (II) shows antiferromagnetic interactions between the Co2+ ions. The solid-state luminescence properties of CP (III) were examined at ambient temperature and the luminescence sensing of Cr2O7 2−/CrO4 2− anions in aqueous solution for (III) has also been investigated.

A new family of lanthanide coordination polymers based on 3,3′-[(5-carboxylato-1,3-phenylene)bis(oxy)]dibenzoate: synthesis, crystal structures and magnetic and luminescence properties

“…Coordination polymers (CPs) are a type of crystalline material composed of metal ions or clusters connected by organic linkers (Zhou et al, 2012). Recently, CPs have shown their usefulness in a wide variety of applications, including catalysis (Guo et al, 2019;Xu et al, 2019), gas storage/separation (Islamoglu et al, 2017;Lara-García et al, 2015), magnetism (Sorace et al, 2011) and luminescence sensing (Xu et al, 2017;Yang et al, 2019). However, a large number of CPs have been synthesized using transition and main group metal ions based on organic ligands.…”

Effects of solvents and metal ions on the synthesis, structural diversity and magnetic properties of the 5′-nitro-[1,1′:3′,1′′-terphenyl]-3,3′′,5,5′′-tetracarboxylic acid ligand and a highly sensitive sensor for Fe3+

“…In 3 , the χ M T values of 3.40 cm 3 K mol −1 at 300 K are larger than the spin-only value (2.00 cm 3 K mol −1 , g = 2.0 and S = 1) expected for high-spin Ni 3 ( ii ) ions. 41 Upon cooling, the χ M T values in 1 , 2 and 3 gradually drop to 3.23 cm 3 K mol −1 (for 1 ), 1.92 cm 3 K mol −1 (for 2 ) and 1.62 cm 3 K mol −1 (for 3 ) at 2 K, respectively. This smooth decrease indicates the occurrence of antiferromagnetic coupling in complexes 1 , 2 and 3 .…”

Synthesis, structure and magnetocaloric properties of a new two-dimensional gadolinium(III) coordination polymer based on azobenzene-2,2′,3,3′-tetracarboxylic acid

“…2. The broad band at 3405 cm À1 indicates O-H stretching of the hydroxy groups and the coordinated water molecules in (I) (Yang et al, 2019b). The characteristic absorption peaks of the asymmetric and symmetric stretching vibrations of the carboxylate groups appear at 1383 and 1563 cm À1 for (I) (Du et al, 2016;Li et al, 2012;Zhang et al, 2015a).…”