Synthesis, characterization and magnetic property of a succinate bridged 1D coordination polymer of cobalt(II) containing benzidine as end-capping ligand

Roy, Subhasis; Choubey, Somnath; Khan, Sumitava; Bhar, Kishalay; Ribas, Joan; Ghosh, Barindra Kumar

doi:10.1016/j.molstruc.2013.12.081

Cited by 13 publications

(14 citation statements)

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“…Plots of J values are shown in Figure against Co---Co distances found in several 1-D compounds (Table S2) in which high-spin Co(+2) ions are bridged by organic molecules ,,− or second metals. ,, Although the trend that the strength of the interaction is weaker as the Co---Co distance is longer is found, the relationship between the J values and distances is not linear, and not clear. The strongest magnetic interactions are observed in [Co 2 PdCl 2 (dpa) 4 ] (dpa = bis(2-pyridyl)amide), where Co ions are bridged by a Pd ion to be Co–Pd–Co with a separation of 5.0 Å.…”

Section: Resultsmentioning

confidence: 99%

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Paramagnetic One-Dimensional Chain Complex Consisting of Three Kinds of Metallic Species Showing Magnetic Interaction through Metal–Metal Bonds

Uemura

Miyake

2019

Inorg. Chem.

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A heterometallic and paramagnetic one-dimensional (1-D) chain (3) aligned as −Rh(+2)−Rh(+2)− Pt(+2)−Co(+2)−Pt(+2)− with direct metal−metal bonds was obtained by HOMO−LUMO interactions at the σ* (d z 2 ) orbital between two kinds of complexes. The 1-D chains in 3 have relatively straight backbones because the raw material complexes, [Rh 2 (O 2 CCH 3 ) 4 ] and [Pt 2 Co(piam) 4 (NH 3 ) 4 ], are connected and stacked in a face-to-face fashion, where Co---Co are separated by about 13.3 Å with four different metals.Physical measurements revealed that 3 has a band gap between the σ-type conduction and valence bands, where dorbitals of the Co ion with three unpaired electrons are laid among them. The magnetic behavior of 3 was investigated and found to be consistent with a complex interaction involving both zero-field splitting and Pauli paramagnetism attributed to band formation superimposed on relatively strong exchange coupling (zJ = −22.2 cm −1 ) between two high-spin Co(+2) ions separated by the diamagnetic Pt−Rh−Rh−Pt.

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Section: Resultsmentioning

confidence: 99%

“…Comparison of J values (cm –1 ) against distances (Å) of Co---Co in reported 1-D compounds. ,,,,,− Open and filled circles are corresponding to that linkers of Co ions are organic molecules or second metals, respectively. Numbers beside circles are reference numbers.…”

Section: Resultsmentioning

confidence: 99%

Paramagnetic One-Dimensional Chain Complex Consisting of Three Kinds of Metallic Species Showing Magnetic Interaction through Metal–Metal Bonds

Uemura

Miyake

2019

Inorg. Chem.

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“…The intrachain Co•••Co separation distance through the succinate bridge is 9.792(6) Å, which is in close agreement with that reported by Roy and co-workers, thereby resulting in a one-dimensional (1D) coordination network topology 2C1 with simple 2-c linear chains (Figure S10). 71 On comparing crystal structures of 1−7, there is an enhancement in the dimensionality of the coordination network to 3D for structures with ratios of metal to bridging ligands of 1:2 (compounds 1 and 2) and 1:3 (compounds 5 and 7) in comparison to 1D coordination polymers with a ratio of 1:1 (compounds 3 and 6). The pyz ligand usually accepts coordination mode B 2 , while the succinate anion can be coordinated in different modes (B 2 , T 3 , K 22 , K 4 , T 11 ) or noncoordinated at all when H-bonds compete with coordination bonds.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Construction of Pyrazine-Appended 1D and 3D Cobalt(II) Succinate Coordination Polymers: Influence of Solvent on Architectures and Applications in Gas Adsorption and NAC Detection

D’souza

Harmalkar

et al. 2022

ACS Omega

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An underexplored reaction of pyrazine (rigid and linear) and succinic acid (flexible) with Co(NO3)2·6H2O afforded four new coordination polymers (CPs): [Co(H2O)(pyz)(suc)] (1), [Co(H2O)2(pyz)(suc)] (2), [Co(H2O)4(pyz)](suc) (3) and [Co2(H2O)2(pyz)(suc)2] (4), as well as [Co(HCO2)2(pyz)] (5) being lately reported along with well-known 6 and 7. The CPs were obtained as stable crystalline materials and characterized by conventional solid-state techniques, including X-ray crystallography. Hydrothermally produced compounds 1 and 2 were both 3D CPs. While 3 and 4 obtained under ambient/solvothermal conditions in DMSO generated 1D and 3D structures, 5 isolated from DMF under solvothermal conditions had a 3D structure. The topologies of the coordination polymers 1–7 were described by underlying nets 3D 5-c fet, 3D 4-c cds, 1D 2-c 2C1, 3D 5-c bnn, 3D 6-c rob, 1D 2-c 2C1, and 3D 6-c pcu, respectively. The plot of χM –1 versus T was essentially linear in the entire temperature range following the Curie–Weiss law with a Curie constant (C) of 2.525 and a negative Weiss constant (ϕ) of −46.24 K, suggesting weak antiferromagnetic (AF) exchange interactions. CO2 and N2 adsorption studies of 1–5 featured type III isotherms. 1 was found to show remarkably higher quenching efficiencies for nitrophenols (η = 98% for o-NP) over other NACs. The Stern–Volmer plot exhibited deviation in linearity with K sv values about 200 times greater than that for the simplest nitroaromatic compound (NB), signifying its exclusive quenching ability toward 1. The LOD for p-NP addition to 1 was found to be 0.995 ppm.

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“…Figure shows the plots of the 2 J values against the M---M distances found in several 1D compounds in which high-spin Mn(+2) ions (Table S2), ,− Co(+2) ions (Table S3), ,,,− and Ni(+2) ions (Table S4) ,,− are bridged by organic molecules or second metals. As a general trend, the strength of the interaction becomes weaker as the M---M distance becomes longer.…”

Section: Resultsmentioning

confidence: 99%

Dimerization of Paramagnetic Trinuclear Complexes by Coordination Geometry Changes Showing Mixed Valency and Significant Antiferromagnetic Coupling through −Pt···Pt– Bonds

Takamori

Uemura

2022

Inorg. Chem.

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Paramagnetic trinuclear complexes, trans-[Pt 2 M-(piam) 4 (NH 3 ) 4 ](ClO 4 ) x (t-M; piam = pivalamidate, M = Mn, Fe, Co, Ni, and Cu, x = 2 or 3), aligned as Pt−M−Pt were successfully synthesized and characterized. The dihedral angles between the Pt and M coordination planes in t-M are approximately parallel, showing straight metal−metal bonds with distances of approximately 2.6 Å. Except for t-Fe, the trinuclear complexes are dimerized with close contact (approximately 3.9 Å) between the end Pt atoms to form Pt−M−Pt•••Pt−M−Pt alignments with high-spin M(+2) containing five (t-Mn), three (t-Co), two (t-Ni), and one (t-Cu) unpaired electrons localized on M atoms. Several physical measurements and calculations revealed that the dimerized structures were maintained in MeCN, where cyclic voltammograms for t-M exhibited two-step oxidation and reduction attributed to Pt−Mvia mixed-valent states. Magnetic susceptibility measurements for t-M showed antiferromagnetic interaction, t-Mn: J = −0.9 cm −1 , t-Co: J = −3.5 cm −1 , t-Ni: J = −7.3 cm −1 , and t-Cu: J = 0.0 cm −1 , between the two M centers with distances of 9.0 Å through Pt•••Pt bonds.

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Synthesis, characterization and magnetic property of a succinate bridged 1D coordination polymer of cobalt(II) containing benzidine as end-capping ligand

Cited by 13 publications

References 57 publications

Paramagnetic One-Dimensional Chain Complex Consisting of Three Kinds of Metallic Species Showing Magnetic Interaction through Metal–Metal Bonds

Paramagnetic One-Dimensional Chain Complex Consisting of Three Kinds of Metallic Species Showing Magnetic Interaction through Metal–Metal Bonds

Construction of Pyrazine-Appended 1D and 3D Cobalt(II) Succinate Coordination Polymers: Influence of Solvent on Architectures and Applications in Gas Adsorption and NAC Detection

Dimerization of Paramagnetic Trinuclear Complexes by Coordination Geometry Changes Showing Mixed Valency and Significant Antiferromagnetic Coupling through −Pt···Pt– Bonds

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