Solvent Responsive Magnetic Dynamics of a Dinuclear Dysprosium Single-Molecule Magnet

A new dysprosium(III) phosphonate dimer {Dy(notpH4)(NO3)(H2O)}2⋅8 H2O (1) [notpH6=1,4,7‐triazacyclononane‐1,4,7‐triyl‐tris(methylenephosphonic acid)] that contains two equivalent DyIII ions with a three‐capped trigonal prism environment is reported. Complex 1 can be transformed into {Dy(notpH4)(NO3)...

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Veröffentlicht in:Chemistry : a European journal 2013-07, Vol.19 (29), p.9619-9628
Hauptverfasser: Ren, Min, Bao, Song-Song, Hoshino, Norihisa, Akutagawa, Tomoyuki, Wang, Bingwu, Ding, Yu-Chen, Wei, Shiqiang, Zheng, Li-Min
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Sprache:eng
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Zusammenfassung:A new dysprosium(III) phosphonate dimer {Dy(notpH4)(NO3)(H2O)}2⋅8 H2O (1) [notpH6=1,4,7‐triazacyclononane‐1,4,7‐triyl‐tris(methylenephosphonic acid)] that contains two equivalent DyIII ions with a three‐capped trigonal prism environment is reported. Complex 1 can be transformed into {Dy(notpH4)(NO3)(H2O)}2 (2) in a reversible manner by desorption and absorption of solvent water at ambient temperature. This process is accompanied by a large dielectric response. Magnetic studies reveal that both 1 and 2 show thermally activated magnetization relaxation as expected for single‐molecule magnets. Moreover, the magnetic dynamics of the two compounds can be manipulated by controlling the number of solvent molecules at room temperature. Under control! The magnetic dynamics of a dinuclear single‐molecule magnet {Dy(notpH4)(NO3)(H2O)}2⋅ 8 H2O (see figure; notpH6=1,4,7‐triazacyclononane‐1,4,7‐triyltris(methylenephosphonic acid)) can be manipulated by controlling the number of solvent molecules at room temperature.
ISSN:0947-6539
1521-3765
DOI:10.1002/chem.201300497