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Single-molecule magnet behavior in a CuII-decorated {DyIII2} complex with nitronyl nitroxide biradicals

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Abstract

Herein, based on a novel nitronyl nitroxide biradical ligand NITPhPyoebis (1) (5-(4-pyridinone)-1,3-bis(1′-oxyl-3′-oxido-4′,4′,5′,5′-tetramethyl-4,5-hydro-1H-imidazol-2-yl)benzene), four 3d–4f heterometallic polynuclear compounds, namely [Ln2Cu2(hfac)10(NITPhOPybis)2] (LnIII = Gd 2, Tb 3, Dy 4 and Ho 5; hfac = hexafluoroacetylacetonate; NITPhOPybis = 5-(4-oxypyridinium-1-yl)-1,3-bis(1′-oxyl-3′-oxido-4′,4′,5′,5′-tetramethyl-4,5-hydro-1H-imidazol-2-yl)benzene) were synthesized successfully. In these 3d–4f compounds, two NITPhOPybis biradical ligands acted as bridge ligands with the μ312 coordination mode to bind two LnIII ions and two CuII ions, generating octa-spin 2p–3d–4f systems. Strong antiferromagnetic coupling was observed between the CuII ion and the coordinated NO group while there is weak antiferromagnetic interaction between the two GdIII ions bridged by double oxygen atoms. The frequency-dependent out-of-phase signals associated with the slow relaxation of magnetization confirm the single-molecule magnet behavior of the Dy complex.

Graphical abstract: Single-molecule magnet behavior in a CuII-decorated {DyIII2} complex with nitronyl nitroxide biradicals

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Publication details

The article was received on 23 Nov 2017, accepted on 24 Jan 2018 and first published on 24 Jan 2018


Article type: Paper
DOI: 10.1039/C7TC05377K
Citation: J. Mater. Chem. C, 2018, Advance Article
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    Single-molecule magnet behavior in a CuII-decorated {DyIII2} complex with nitronyl nitroxide biradicals

    H. Li, Z. Sun, J. Sun, L. Xi, J. Guo, G. Sun, J. Xie, Y. Ma and L. Li, J. Mater. Chem. C, 2018, Advance Article , DOI: 10.1039/C7TC05377K

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