Oxalato as polyatomic coordination center and magnetic coupler in copper(II)-polypyrazole inverse polynuclear complexes and coordination polymers

Castro, Isabel; Calatayud, M. Luisa; Orts-Arroyo, Marta; Marino, Nadia; Munno, Giovanni De; Lloret, Francesc; Ruiz-Garcı́a, Rafael; Julve, Miguel

doi:10.1016/j.ccr.2022.214730

Cited by 5 publications

(4 citation statements)

References 213 publications

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“…On the other hand, oxalato-bridged Cu(II) chains were reported to show ferromagnetism, although slow magnetic relaxation has not been reported. 24,25 In contrast, the Cu(II) centres of the chain in this study are all ferromagnetically coupled and show slow magnetic relaxation This work thus presents a new insight into the potential of Cu(II) polymer chains that have ferromagnetic interactions and exhibit slow magnetic relaxation, which have traditionally been overlooked.…”

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confidence: 78%

Slow magnetic relaxation in a ferromagnetic Cu^II chain complex, induced by a phonon bottleneck effect

Sunkari,

Verma,

Pandey

et al. 2023

Dalton Trans.

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confidence: 78%

Slow magnetic relaxation in a ferromagnetic Cu^II chain complex, induced by a phonon bottleneck effect

Sunkari,

Verma,

Pandey

et al. 2023

Dalton Trans.

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“…The χ M T versus T and M versus H curves were fitted simultaneously using the PHI software (version 3.1.6, N. Chilton, Manchester, UK) [56], resulting in the following parameters: J = −31.96(2) cm −1 ; J = +1.34(2) cm −1 ; and g = 2.12(1) with R (χT) = 2.21 × 10 −5 , R (MxH 2 . 5K) = 5.32 × 10 −4 and R (MxH 5K) = 9.95 × 10 −4 (R is the agreement factor defined as R = Σ[P exp -P calcd ] 2 /Σ(P exp ) 2 , with P being the measured physical property).…”

Section: Magnetic Properties Ofmentioning

confidence: 99%

“…The experimental magnetic data were analyzed using the spin Hamiltonian given by Equation (1) (with S1 = S2 = S3 = S1' = S2' = S3' = 1/2), where J (J = J12 = J23 = J1'2' = J2'3') and J′ (J′ = J11') are the intra-and intertrinuclear magnetic coupling parameters (Scheme 2), and g is the average Landé factor of the copper(II) ions (g = g1 = g2 = g3 = g1' = g2' = g3'). The χMT versus T and M versus H curves were fitted simultaneously using the PHI software (version 3.1.6, N. Chilton, Manchester, UK) [56], resulting in the following parameters: J = −31.96(2) cm −1 ; J′ = +1.34(2) cm −1 ; and g = 2.12(1) with R(χT) = 2.21 × 10 −5 , R(MxH 2.5K) = 5.32 × 10 −4 and R(MxH 5K) = 9.95 × 10 −4 (R is the agreement factor defined as R = Σ[Pexp-Pcalcd] 2 /Σ(Pexp) 2 , with P being the measured physical property). The theoretical curves match perfectly with the experimental data (Figure 5).…”

Section: Magnetic Properties Ofmentioning

confidence: 99%

Solid-State Self-Assembly of a Linear Hexanuclear Copper(II) Oxamate Complex with Alternating Antiferro- and Ferromagnetic Coupling

et al. 2022

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In this work, we describe the synthesis, crystal structure and magnetic properties of the neutral hexacopper(II) complex of formula {[Cubpca)]2[Cu(dmopba)(H2O)]}2·4H2O (1), where Hbpca = bis(2-pyridylcarbonyl)-amide and dmopba = 4,5-dimethyl-1,2-phenylenebis(oxamato). Single crystals of 1 were obtained from the stoichiometric reaction (1:2 molar ratio) of the mononuclear copper(II) complexes (n-Bu4N)2[Cu(dmpba)] and [Cu(bpca)(H2O)2]NO3·2H2O through slow diffusion techniques in water as a solvent. The crystal structure of 1 shows that two neutral {[Cu(bpca)]2[Cu(dmopba)(H2O)]} trinuclear units are connected through double out-of-plane copper to outer carboxylate oxygen atoms resulting in a unique oxamate-bridged linear hexanuclear complex. Hydrogen bonds among adjacent entities involving the non-coordinated water molecules result in a supramolecular 3D network. Magnetic measurements on 1 show the occurrence of moderate antiferromagnetic intratrinuclear interactions between the copper(II) ions from the [Cu(bpca)]+ and [Cu(dmopba)(H2O)]2− fragments across the oxamate bridge and a weak intertrinuclear ferromagnetic interaction between the copper(II) ions that occurs between the two central [Cu(bpca)]+ fragments mediated by the carboxylate groups from the oxamate bridge [J = −31.96(2) cm−1 and J′ = +1.34(2) cm−1; H = J (S1·S2 + S2·S3 + S1′·S2′ + S2′·S3′) + J′ (S1·S1′)].

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“…Coordination polymers (CPs) have garnered significant interest in crystal chemistry and materials science due to their intriguing structures and potential applications in various fields. These include catalysis (Adamji et al, 2023;Suremann et al, 2023;Wu et al, 2023;Xu et al, 2022), adsorption and separation (Chen et al, 2023;Daglar et al, 2021;Keasler et al, 2023;Liang et al, 2023), fluorescence sensing (Halder et al, 2023;Li et al, 2023), magnetism (Castro et al, 2022;Dong et al, 2023;Weng et al, 2011;Xu et al, 2023), and so on (Biswas et al, 2021;Naskar et al, 2017;Paul et al, 2017). The development of these CPs is commonly recognised to be predominantly influenced by the characteristics of the organic building blocks, the coordination geometry of the inorganic metal nodes and several synthetic parameters (Batten et al, 2016;Han et al, 2014;Rosa et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Synthesis, structure and photoluminescence properties of heterometallic-based coordination polymers of trimesic acid

Chinchan,

Jiajaroen,

Theppitak

et al. 2024

Acta Crystallogr C

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Reacting trimesic acid (H3TMA, C9H6O6) with CaCl2 and MCl2 at 110 °C under hydrothermal conditions gave the isostructural heterobimetallic coordination polymers (CPs) catena-poly[[tetraaquazinc(II)]-μ-5-carboxybenzene-1,3-dicarboxylato-[tetraaquacalcium(II)]-μ-5-carboxybenzene-1,3-dicarboxylato], [CaZn(HTMA)2(H2O)8] n , 1, and catena-poly[[tetraaquacobalt(II)]-μ-5-carboxybenzene-1,3-dicarboxylato-[tetraaquacalcium(II)]-μ-5-carboxybenzene-1,3-dicarboxylato], [CaCo(HTMA)2(H2O)8] n , 2. Compounds 1 and 2 crystallize in the monoclinic space group C2/c. The solid-state structures consist of eight-coordinate CaII ions and six-coordinate M II ions. These ions are connected by a doubly deprotonated HTMA2− ligand to create a one-dimensional (1D) zigzag chain. Poly[[decaaquabis(μ3-benzene-1,3,5-tricarboxylato)calcium(II)dizinc(II)] dihydrate], {[CaZn2(TMA)2(H2O)10]·2H2O} n , 3, was found incidentally as a minor by-product during the synthesis of 1 at a temperature of 140 °C. It forms crystals in the orthorhombic space group Ccce. The structure of 3 consists of a two-dimensional (2D) layer composed of [Zn(TMA)] chains that are interconnected by CaII ions. The presence of aromatic carboxylic acid ligands and water molecules, which can form numerous hydrogen bonds and π–π interactions, increases the stability of the three-dimensional (3D) supramolecular architecture of these CPs. Compounds 1 and 2 exhibit thermal stability up to 420 °C, as indicated by the thermogravimetric analysis (TGA) curves. The powder X-ray diffraction (PXRD) data reveal the formation of unidentified phases in methanol and dimethyl sulfoxide, while 1 exhibits chemical stability in a wide range of solvents. The luminescence properties of 1 dispersed in various low molecular weight organic solvents was also examined. The results demonstrate excellent selectivity, sensitivity and recyclability for detecting acetone molecules in aqueous media. Additionally, a possible sensing mechanism is also outlined.

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Oxalato as polyatomic coordination center and magnetic coupler in copper(II)-polypyrazole inverse polynuclear complexes and coordination polymers

Cited by 5 publications

References 213 publications

Slow magnetic relaxation in a ferromagnetic Cu^II chain complex, induced by a phonon bottleneck effect

Slow magnetic relaxation in a ferromagnetic Cu^II chain complex, induced by a phonon bottleneck effect

Solid-State Self-Assembly of a Linear Hexanuclear Copper(II) Oxamate Complex with Alternating Antiferro- and Ferromagnetic Coupling

Synthesis, structure and photoluminescence properties of heterometallic-based coordination polymers of trimesic acid

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Oxalato as polyatomic coordination center and magnetic coupler in copper(II)-polypyrazole inverse polynuclear complexes and coordination polymers

Cited by 5 publications

References 213 publications

Slow magnetic relaxation in a ferromagnetic CuII chain complex, induced by a phonon bottleneck effect

Slow magnetic relaxation in a ferromagnetic CuII chain complex, induced by a phonon bottleneck effect

Solid-State Self-Assembly of a Linear Hexanuclear Copper(II) Oxamate Complex with Alternating Antiferro- and Ferromagnetic Coupling

Synthesis, structure and photoluminescence properties of heterometallic-based coordination polymers of trimesic acid

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Slow magnetic relaxation in a ferromagnetic Cu^II chain complex, induced by a phonon bottleneck effect

Slow magnetic relaxation in a ferromagnetic Cu^II chain complex, induced by a phonon bottleneck effect