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      Multiple thermal magnetic relaxation in a two-dimensional ferromagnetic dysprosium(iii) metal–organic framework

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          Abstract

          Intramolecular ferromagnetic interaction exists in a dysprosium( iii) MOF with a highly ordered 2D (4, 4) grid network, showing two-step thermal magnetic relaxation.

          Abstract

          A new two-dimensional (2D) lanthanide metal–organic framework, {[Dy 2(HCAM) 3(H 2O) 4]·2H 2O} n ( 1, H 3CAM = 4-hydroxypyridine-2,6-dicarboxylic acid) has been hydrothermally synthesized and structurally characterized using single-crystal X-ray diffraction. There are two crystallographically independent dysprosium atoms in 1, displaying spherical tricapped trigonal prism geometry and square antiprism geometry, respectively. The dysprosium( iii) ions are connected with each other through the bridging HCAM 2− anions, generating a classical 2D (4, 4) grid structure. Magnetic investigations revealed that intramolecular ferromagnetic interactions exist among the dysprosium( iii) ions in 1, which shows field-induced two-step thermal magnetic relaxation, with the effective thermal barriers of 63.5 K and 57.1 K, respectively.

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          Most cited references76

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          Lanthanide single-molecule magnets.

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            Luminescent multifunctional lanthanides-based metal-organic frameworks.

            Metal-organic frameworks based on trivalent lanthanides (LnMOFs) are a very promising class of materials for addressing the challenges in engineering of luminescent centres. Lanthanide-bearing phosphors find numerous applications in lighting, optical communications, photonics and biomedical devices. In this critical review we discuss the potential of LnMOFs as multifunctional systems, which combine light emission with properties such as microporosity, magnetism, chirality, molecule and ion sensing, catalysis and activity as multimodal imaging contrast agents. We argue that these materials present a unique chance of observing synergy between several of these properties, such as the coupling between photoluminescence and magnetism. Moreover, an integrated approach towards the design of efficient, stable, cheap, environmentally-friendly and multifunctional luminescent LnMOFs is still missing. Although research into LnMOFs is at its early stage and much basic knowledge is still needed, the field is ripe for new ideas, which will enable sensor devices and photonic prototypes to become a commercial reality (81 references).
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              Strategies towards single molecule magnets based on lanthanide ions

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                Author and article information

                Journal
                RSCACL
                RSC Advances
                RSC Adv.
                Royal Society of Chemistry (RSC)
                2046-2069
                2015
                2015
                : 5
                : 127
                : 104854-104861
                Affiliations
                [1 ]Beijing National Laboratory for Molecular Sciences
                [2 ]Center for Molecular Science
                [3 ]Key Laboratory of Organic Solids
                [4 ]Institute of Chemistry
                [5 ]Chinese Academy of Sciences
                [6 ]State Key Laboratory of Rare Earth Materials Chemistry and Applications
                [7 ]College of Chemistry and Molecular Engineering
                [8 ]Peking University
                [9 ]Beijing 100871
                [10 ]P. R. China
                Article
                10.1039/C5RA23638J
                03056aa9-833b-4f7e-a1f2-299434325ec3
                © 2015
                History

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