Synthesis, Crystal Structure and Magnetic Property of Double μ 6-CO3 2− Centered Nonanuclear Ni(II) Cluster

Wang, Cui Cui; Li, Hai Ye; Zhang, Xiao Qiang; Jiang, Yi Min; Zhang, Shu Hua

doi:10.1007/s10876-014-0796-z

Cited by 4 publications

(1 citation statement)

References 67 publications

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“…It is well-known that high-spin cobalt ions have a wide range of applications in magnetism due to unquenched orbital angular momentum − and a diversity of coordination modes. − Therefore, by using Co(ClO 4 ) 2 ·6H 2 O in place of Cu(ClO 4 ) 2 ·6H 2 O and in a solvent mixture of CH 3 CN/H 2 O (v/v: 1:1), we obtained a enneanuclear {Co 9 } 2+ cluster (compound 4 ). Interestingly, there are two CO 3 2– centers to connect Co 2+ in each {Co 9 } 2+ core; as previously reported, the CO 3 2– coordinated to cobalt centers comes from atmospheric carbon dioxide. − By changing the volume ratio of the solvent into 10:1, enneanuclear cluster 5 with a similar metal-core structure as 4 was obtained, except that an additional formate anion replaced the coordinated water to a Co II cation due to the decrease of the water ratio in the solvent. As a result, by turning the solvent/metal center, a significantly different crystal packing of complexes was successfully synthesized, resulting in the changing of magnetic properties.…”

Section: Results and Discussionsupporting

confidence: 60%

New High-Nuclear Coordination Complexes Constructed by 2-Hydroxymethylpyridine: From Antiferromagnetic to Spin Glass and Ferromagnetic Behavior

Qin

Zhao

et al. 2021

Crystal Growth & Design

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Five new nuclear coordination complexes based on a 2-hydroxymethylpyridine (Hhmp) ligand, [Cu4(hmp)4(CHOO)2(H2O)2](ClO4)2·2H2O (1), [Cu8(hmp)8(CHOO)4(CH3CN)2(H2O)4](ClO4)4·2CH3CN (2), {[Cu2(hmp)2(CHOO)(H2O)]ClO4·H2O}n (3), [Co9(hmp)6(CHOO)6(CO3)2(H2O)6](ClO4)2·11H2O (4), and [Co9(hmp)6(CHOO)7(CO3)2(H2O)5]ClO4·CH3CN·12H2O (5), have been synthesized through evaporation at room temperature. As expected, by changing the ratio of the mixed solvent complexes, 1–3 successfully grow from a [Cu4O4] monocubane (1) to octanuclear double-cubane (2), which then further extends into polycubane (3, one-dimensional chain) via bridging ligands of formate. By changing the metal source, complexes 4 and 5 with a similar {Co9} cluster are successfully obtained. One water molecule coordinated with CoII in one [Co4O4] core of complex 4 has been replaced by a formate anion in complex 5, resulting in the {Co9} cluster with +2 and +1 charges, respectively. The change of charges on the clusters results in different cluster alignments, changing the intermolecular interactions in 4 and 5. Magnetic measurements show that antiferromagnetism interaction changes into weak ferromagnetic interaction in complexes 1–3, while the antiferromagnetic behavior turns to glass spin in complexes 4 and 5.

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