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RESEARCH PRODUCT
From Bowls to Capsules: Assembly of Hexanuclear Ni II Rings Tailored by Alkali Cations
Júlia MayansAlbert EscuerConstantinos C. StoumposMercè Font-bardiasubject
chemistry.chemical_classificationNíquelPropietats magnètiques010405 organic chemistryOrganic ChemistrySupramolecular chemistrychemistry.chemical_elementGeneral Chemistry010402 general chemistryBlock (periodic table)Alkali metal01 natural sciencesCatalysisAnàlisi de conglomerats0104 chemical sciencesCrystallographyNickelCluster analysischemistryNickelMagnetic propertiesAntiferromagnetismSelf-assemblyGround stateAlkyldescription
An anionic hexanuclear NiII metallamacrocycle with endo and exo linking sites has been employed as a building block to generate a series of capsules and bowls of nanometric size. The supramolecular arrangement of the {Ni6 } rings was tailored by the size of the alkali cations, showing the transition from {Ni6 -M2 -Ni6 } capsules (M=LiI and NaI ) to {Ni6 -M} bowls (M=KI and CsI ). The alkyl co-cations are determinant to stabilize the assemblies by means of CH⋅⋅⋅π interactions on the exo side of the metallamacrocycles. The effect on the topology of the supramolecular assemblies of the cation size, cation charge, Et3 NH+ or Me4 N+ counter cations has been analyzed. Magnetic measurements reveal the presence of ferromagnetic and antiferromagnetic interactions inside the rings that allow a S=0 ground state.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-07-29 | Chemistry – A European Journal |