Field-Induced Slow Magnetic Relaxation in CoII Cyclopropane-1,1-dicarboxylates

Matyukhina, A. K.; Зорина-Тихонова, Е. Н.; Goloveshkin, Alexander S.; Babeshkin, Konstantin A.; Ефимов, Н. Н.; Кискин, М. А.; Еременко, И. Л.

doi:10.3390/molecules27196537

Cited by 8 publications

(3 citation statements)

References 63 publications

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“…Metal-organic coordination polymers (MOCPs) have attracted significant research attention due to their broad structural design [1][2][3] and targeted modulation of properties that is possible by varying functional metal centers [4], organic ligands [5], and guest substrates [6]. Polynuclear and polymeric blocks consisting of unpaired electron-rich metal ions can present valuable magnetic properties (such as ferro- [7], antiferro- [8], and ferrimagnets [9], as well as slow magnetic relaxation [10,11]), complex luminescence patterns [12,13], redox behavior [14], and unique chemical bonding features [15]. In particular, such metal centers are of interest for the synthesis of MOCPs with designable and unique properties and unveil the usage of coordination polymers in diverse magnetic materials [16], in highly efficient luminophores and sensors [4,17], for data storage [18], and for production of multifunctional and "smart" materials [19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structure and Magnetic Properties of Low-Dimensional Copper(II) trans-1,4-cyclohexanedicarboxylate

Demakov,

Ovchinnikova,

Dorovatovskii

et al. 2024

Crystals

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A reaction between copper(II) nitrate and trans-1,4-cyclohexanedicarboxylic acid (H2chdc) carried out under hydrothermal conditions led to a new metal-organic coordination polymer [Cu2(Hchdc)2(chdc)]n. According to single-crystal XRD data, the compound is based on bi-nuclear paddlewheel-type carboxylate blocks that are joined with polymeric chains due to the (μ3-κ1:κ2) coordination of carboxylate groups. The chains are interconnected by chdc2− bridging ligands into layers containing free COOH groups of terminal Hchdc−. The neighboring layers adopt a RCOOH···OOCR hydrogen bond-assisted arrangement into a dense-packed structure. Magnetization measurements showed the presence of a strong antiferromagnetic exchange interaction (J/kB = −495 K) inside the bi-nuclear blocks. At the same time, no significant interaction was found between the {-Cu2(OOCR)4-} units in spite of their polymeric in-chain packing. Patterns of magnetic behavior of [Cu2(Hchdc)2(chdc)]n were thoroughly analyzed and explained from a structural point of view.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Structure and Magnetic Properties of Low-Dimensional Copper(II) trans-1,4-cyclohexanedicarboxylate

Demakov,

Ovchinnikova,

Dorovatovskii

et al. 2024

Crystals

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“…By varying the substituents in the methylene group of malonic acid, it is possible to change the structure and properties of the resulting compounds, which was previously demonstrated for homometallic complexes of manganese(II), − cobalt(II), − nickel(II), , copper(II), − etc. Moreover, the structure of malonate complexes of transition metals, and hence their properties, can be changed by introducing atoms of s-, d-, or f-elements into a compound. − To date, vast data on the synthesis, structural features, and properties of transition metal complexes (with the exception of iron) with anions of substituted malonic acids and atoms of s-elements have been collected.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Alkali Metals on the Structures and Properties of Fe(III) Heterometallic Cyclobutane-1,1-dicarboxylate Complexes

Blinou

Зорина-Тихонова

Voronina

et al. 2023

Crystal Growth & Design

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Three FeIII-MI heterometallic complexes with anions of cyclobutane-1,1-dicarboxylic acid (H2cbdc) dianions [MIFe(cbdc)2(H2O)2] n (MI = Na (1), Rb (2) or Cs (3)) were obtained, with the compounds being two-dimensional (2D)-coordination polymers built of bischelate moieties {Fe(cbdc)2(H2O)2}− bound with alkali metal ions. In 1, the two coordinated water molecules are in the cis-position, while in 2 and 3 they are in the trans-position. The DC magnetic data and ab initio calculations demonstrate that Fe3+ ions in 1 possess a negative D value, while those in 2 and 3 have a positive D value. The easy-axis anisotropy found for 1 is a rare example for Fe3+ ions. A topological analysis of the compounds synthesized and a series of known mononuclear octahedrally coordinated Fe3+ complexes (from Cambridge Structural Database) that are interconnected into a crystal structure by alkali metal cations in a way similar to complexes 1–3 was carried out.

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“…Typically, MOFs are based on carboxylate anions, capable of a decently strong binding to the wide range of metal ions [1,2], or di-/polytopic N-donor bridges, whose strong coordination abilities are mostly related to Pearson's soft cations [3][4][5]. Metal-organic frameworks based on ligands of such types as well as their-derived composites are widely used in the selective adsorption [6], gas separations [7], electrochemical devices [8,9] and single-molecule magnets [10].…”

Section: Introductionmentioning

confidence: 99%

Flexible Co(II)-and Ni(II)-Based Cationic 2D Metal–Organic Frameworks Based on a Charge-Neutral (O,O)-Donor Bridge

et al. 2023

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Two new metal–organic frameworks based on highly flexible 1,4-diazabicyclo[2.2.2]octane N,N′-dioxide (odabco) ligands were successfully synthesized and characterized. Their crystallographic formulae are [M(DMF)2(odabco)2](ClO4)2·dioxane, where M2+ = Co2+ (1) and Ni2+ (2), and DMF is N,N-dimethylformamide. The title compounds possess cationic 2D coordination networks filled with perchlorate anions and dioxane solvent molecules in the interlayer space, with 20% solvent accessible volume. Carbon dioxide adsorption measurements for desolvated samples 1a and 2a gave 511 m2/g and 377 m2/g specific surface areas, respectively, revealing the first example of gas adsorption properties in the structure based on a flexible odabco bridge, despite the presence of large counteranions within the positively charged network. Magnetization measurements for 1, 1a, 2 and 2a reveal their paramagnetic nature to be in a reasonable agreement with crystal structures, and almost no solvent dependence of the magnetization characteristics. A decrease in the effective magnetic moment observed at low temperatures is attributed mostly to zero-field level-splitting in the octahedral Ni2+ and Co2+ ions.

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Field-Induced Slow Magnetic Relaxation in CoII Cyclopropane-1,1-dicarboxylates

Cited by 8 publications

References 63 publications

Synthesis, Structure and Magnetic Properties of Low-Dimensional Copper(II) trans-1,4-cyclohexanedicarboxylate

Synthesis, Structure and Magnetic Properties of Low-Dimensional Copper(II) trans-1,4-cyclohexanedicarboxylate

Impacts of Alkali Metals on the Structures and Properties of Fe(III) Heterometallic Cyclobutane-1,1-dicarboxylate Complexes

Flexible Co(II)-and Ni(II)-Based Cationic 2D Metal–Organic Frameworks Based on a Charge-Neutral (O,O)-Donor Bridge

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