A nanoporous molecular magnet with reversible solvent-induced mechanical and magnetic properties

Daniel Maspoch; Daniel Ruiz-Molina; Klaus Wurst; Neus Domingo; Massimilliano Cavallini; Fabio Biscarini; Javier Tejada; Concepció Rovira; Jaume Veciana

doi:10.1038/nmat834

A nanoporous molecular magnet with reversible solvent-induced mechanical and magnetic properties

Daniel Maspoch, Daniel Ruiz-Molina, Klaus Wurst, Neus Domingo, Massimilliano Cavallini, Fabio Biscarini, Javier Tejada, Concepció Rovira, Jaume Veciana

Research output: Contribution to journal › Article › peer-review

624 Scopus citations

Abstract

Interest in metal-organic open-framework structures has increased enormously in the past few years because of the potential benefits of using crystal engineering techniques to yield nanoporous materials with predictable structures and interesting properties. Here we report a new efficient methodology for the preparation of metal-organic open-framework magnetic structures based on the use of a persistent organic free radical (PTMTC), functionalized with three carboxylic groups. Using this approach, we create an open-framework structure Cu₃(PTMTC)₂(py)₆(CH₃CH₂OH )₂(H₂O), which we call MOROF-1, combining very large pores (2.8-3.1 nm) with bulk magnetic ordering. MOROF-1 shows a reversible and highly selective solvent-induced 'shrinking-breathing' process involving large volume changes (25-35%) that strongly influence the magnetic properties of the material. This magnetic sponge-like behaviour could be the first stage of a new route towards magnetic solvent sensors.

Original language	English
Pages (from-to)	190-195
Number of pages	6
Journal	Nature Materials
Volume	2
Issue number	3
DOIs	https://doi.org/10.1038/nmat834
State	Published - Mar 2003
Externally published	Yes

Funding

This work was supported by the Programa Nacional de Materiales of the Dirección General de Investigación (Spain), under project MAGMOL. D.M. is grateful to the Generalitat de Catalunya for a predoctoral grant.We thank P. Gerbier of the Université Montpellier for TG-MS experiments and X.Alcobé of the Universitat de Barcelona for X-ray powder diffraction measurements. Correspondence and requests for materials should be addressed to C.R or J.V. Supplementary Information is available on the Nature Materials website (http://www.nature.com/naturematerials).

Funders	Funder number
Dirección General de Investigación Científica y Técnica

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abstract = "Interest in metal-organic open-framework structures has increased enormously in the past few years because of the potential benefits of using crystal engineering techniques to yield nanoporous materials with predictable structures and interesting properties. Here we report a new efficient methodology for the preparation of metal-organic open-framework magnetic structures based on the use of a persistent organic free radical (PTMTC), functionalized with three carboxylic groups. Using this approach, we create an open-framework structure Cu3(PTMTC)2(py)6(CH3CH2OH )2(H2O), which we call MOROF-1, combining very large pores (2.8-3.1 nm) with bulk magnetic ordering. MOROF-1 shows a reversible and highly selective solvent-induced 'shrinking-breathing' process involving large volume changes (25-35%) that strongly influence the magnetic properties of the material. This magnetic sponge-like behaviour could be the first stage of a new route towards magnetic solvent sensors.",

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AU - Cavallini, Massimilliano

AU - Biscarini, Fabio

AU - Tejada, Javier

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AB - Interest in metal-organic open-framework structures has increased enormously in the past few years because of the potential benefits of using crystal engineering techniques to yield nanoporous materials with predictable structures and interesting properties. Here we report a new efficient methodology for the preparation of metal-organic open-framework magnetic structures based on the use of a persistent organic free radical (PTMTC), functionalized with three carboxylic groups. Using this approach, we create an open-framework structure Cu3(PTMTC)2(py)6(CH3CH2OH )2(H2O), which we call MOROF-1, combining very large pores (2.8-3.1 nm) with bulk magnetic ordering. MOROF-1 shows a reversible and highly selective solvent-induced 'shrinking-breathing' process involving large volume changes (25-35%) that strongly influence the magnetic properties of the material. This magnetic sponge-like behaviour could be the first stage of a new route towards magnetic solvent sensors.

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A nanoporous molecular magnet with reversible solvent-induced mechanical and magnetic properties

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