Building-up host–guest helicate motifs and chains: a magneto-structural study of new field-induced cobalt-based single-ion magnets

Campos, Nathalia Rodrigues; Simosono, Cintia Almeida; Rosa, Iara M. L.; Silva, Rafaela M. R. da; Pim, Walace D. do; Simões, Tatiana R. G.; Valdo, Ana Karoline Silva Mendanha; Martins, Felipe Terra; Sarmiento, Charlie V.; Nunes, Wallace C.; Guedes, Guilherme P.; Pedroso, Emerson F.; Pereira, Cynthia L. M.; Stumpf, Humberto O.; Lloret, Francesc; Julve, Miguel; Marinho, Maria Vanda

doi:10.1039/d1dt01693h

Cited by 7 publications

(5 citation statements)

References 135 publications

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“…This is because it is widely recognized that factors such as temperature, molar ratio of reagents, geometric characteristics, and coordination sites of the organic ligands 27–30 can have a significant impact on crystal growth. Moreover, the choice of synthetic strategies, such as stirring, 9,31 diffusion, 32 solvothermal (particularly when mixed organic solvents are employed), 8 and hydrothermal (used when water is the only solvent), 22,33 can also influence the process. Regarding the synthetic approach, it is noteworthy that the solvothermal method is more commonly employed compared to the hydrothermal one for the rational design and synthesis of coordination compounds derived from H 4 bttb or H 2 -2,5pzdc acids (as indicated in Table S1†).…”

Section: Resultsmentioning

confidence: 99%

Intensity and lifetime ratiometric luminescent thermometer based on a Tb(iii) coordination polymer

Costa,

da Silva,

Botelho

et al. 2024

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

Intensity and lifetime ratiometric luminescent thermometer based on a Tb(iii) coordination polymer

Costa,

da Silva,

Botelho

et al. 2024

Dalton Trans.

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“…For Co-MOF 2 , the χ M T value of 6.10 cm 3 K mol –1 at 300 K is higher than the theoretical value of 5.16 cm 3 K mol –1 of two and three-quarters independent high-spin Co (II) ions, which is also caused by the spin–orbit coupling between Co (II) ions . With the decrease of temperature, the χ M T value of Co-MOF 2 gradually decreases.…”

Section: Resultsmentioning

confidence: 99%

pH-Induced Two Co (II) Metal–Organic Frameworks with Different Topologies: Magnetism and CO₂/CH₄ Separation

Zhang,

Zhang

et al. 2024

Crystal Growth & Design

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The self-assembly process of the metal–organic framework (MOF) is affected by many factors, so the construction of the MOF with unique structure and properties is still a great challenge. Herein, based on 3,5-bis (2,5-dicarboxylic phenyl) benzoic acid (H5L), two novel 3D porous Co-MOFs, {[Co3(HL)2(μ2-H2O)2]·2NH3·4CH3CN·4H2O}n (Co-MOF 1) and {[Co2.75(L)(H2O)3.5(μ3-OH)]·0.5NH3·3CH3CN·3H2O}n (Co-MOF 2), were designed and constructed by changing the pH under solvothermal condition. Co-MOF 1 displays a 2-node (4, 8)-c flu topological network with the symbol of {4·126·1284}{46}2, while Co-MOF 2 exhibits a 3-n (4,4,6)-c 4,4,6T17 (MOF.ttd) topology type with the symbol of {4·284}{4·462}4{4·76·882}2. Meanwhile, the magnetic test results of Co-MOFs show that Co-MOFs have antiferromagnetic interaction between Co (II) ions. Furthermore, the adsorption selectivities (S ads) of Co-MOFs for 0.05/0.95 CO2/CH4 binary mixture are 27.1 (Co-MOF 1) and 38.0 (Co-MOF 2) at 298 K, respectively, and the high adsorption performance of Co-MOFs for CO2 was attributed to the smaller dynamic radius, larger quadrupole moment, and higher polarizability of CO2, the strong adsorption heat of Co-MOFs for CO2, and the strong interaction force between Co-MOFs and CO2. In addition, the action sites and bond energy of the hydrogen bonds between CO2 and Co-MOF 2 (O–H···O) are obviously better than those between CO2 and Co-MOF 1 (C–H···O) simulated by Grand canonical Monte Carlo simulations.

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“…In one of very scarce works, Marinho et al synthesized by carefully controlled conditions four variants of Co(II) coordination polymer which differed in their folding. The conformation of bridges manifested itself in the relaxation of the chain-arranged SIMs [45]. However, to the best of our knowledge no study yet addressed the question of the effect of rigidity of bridges connecting SIM centres.…”

Section: Introductionmentioning

confidence: 94%

The Role of the Bridge in Single-Ion Magnet Behaviour: Reinvestigation of Cobalt(II) Succinate and Fumarate Coordination Polymers with Nicotinamide

et al. 2022

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Two previously synthesized cobalt(II) coordination polymers; {[Co(μ2-suc)(nia)2(H2O)2]·2H2O}n (suc = succinate(2−), nia = nicotinamide) and [Co(μ2-fum)(nia)2(H2O)2]n (fum = fumarate(2−)) were prepared and thoroughly characterized. Both complexes form 1D coordination chains by bonding of Co(nia)2(H2O)2 units through succinate or fumarate ligands while these chains are further linked through hydrogen bonds to 3D supramolecular networks. The intermolecular interactions of both complexes are quantified using Hirshfeld surface analysis and their infrared spectra, electronic spectra and static magnetic properties are confronted with DFT and state-of-the-art ab-initio calculations. Dynamic magnetic measurements show that both complexes exhibit single-ion magnet behaviour induced by a magnetic field. Since they possess very similar chemical structure, differing only in the rigidity of the bridge between the magnetic centres, this chemical feature is put into context with changes in their magnetic relaxation.

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Building-up host–guest helicate motifs and chains: a magneto-structural study of new field-induced cobalt-based single-ion magnets

Abstract: In this work, we present the synthetic pathway, a refined structural description, complete solid-state characterization and the magnetic properties of four new cobalt(II) compounds of formulas [Co(H2O)6][Co2(H2mpba)3]∙2H2O∙0.5dmso (1), [Co(H2O)6][Co2(H2mpba)3]∙3H2O∙0.5dpss (2),...

Cited by 7 publications

References 135 publications

Intensity and lifetime ratiometric luminescent thermometer based on a Tb(iii) coordination polymer

Intensity and lifetime ratiometric luminescent thermometer based on a Tb(iii) coordination polymer

pH-Induced Two Co (II) Metal–Organic Frameworks with Different Topologies: Magnetism and CO₂/CH₄ Separation

The Role of the Bridge in Single-Ion Magnet Behaviour: Reinvestigation of Cobalt(II) Succinate and Fumarate Coordination Polymers with Nicotinamide

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Building-up host–guest helicate motifs and chains: a magneto-structural study of new field-induced cobalt-based single-ion magnets

Abstract: In this work, we present the synthetic pathway, a refined structural description, complete solid-state characterization and the magnetic properties of four new cobalt(II) compounds of formulas [Co(H2O)6][Co2(H2mpba)3]∙2H2O∙0.5dmso (1), [Co(H2O)6][Co2(H2mpba)3]∙3H2O∙0.5dpss (2),...

Cited by 7 publications

References 135 publications

Intensity and lifetime ratiometric luminescent thermometer based on a Tb(iii) coordination polymer

Intensity and lifetime ratiometric luminescent thermometer based on a Tb(iii) coordination polymer

pH-Induced Two Co (II) Metal–Organic Frameworks with Different Topologies: Magnetism and CO2/CH4 Separation

The Role of the Bridge in Single-Ion Magnet Behaviour: Reinvestigation of Cobalt(II) Succinate and Fumarate Coordination Polymers with Nicotinamide

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pH-Induced Two Co (II) Metal–Organic Frameworks with Different Topologies: Magnetism and CO₂/CH₄ Separation