A Spontaneous Condensation Sequence from a {Fe 6 Dy 3 } Wheel to a {Fe 7 Dy 4 } Globe

Botezat Olga; Van Leusen Jan; Hauser J; Decurtins Silvio; Liu Shi-Xia; Kogerler Paul; Baca Svetlana

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BOTEZAT, Olga, VAN LEUSEN, Jan, HAUSER, J, DECURTINS, Silvio, LIU, Shi-Xia, KOGERLER, Paul, BACA, Svetlana. A Spontaneous Condensation Sequence from a {Fe 6 Dy 3 } Wheel to a {Fe 7 Dy 4 } Globe. In: Crystal Growth and Design, 2019, nr. 4(19), pp. 2097-2103. ISSN 1528-7483. DOI: https://doi.org/10.1021/acs.cgd.8b01668

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Crystal Growth and Design

Numărul 4(19) / 2019 / ISSN 1528-7483

A Spontaneous Condensation Sequence from a {Fe ₆ Dy ₃ } Wheel to a {Fe ₇ Dy ₄ } Globe

DOI:https://doi.org/10.1021/acs.cgd.8b01668

Pag. 2097-2103

Botezat Olga¹², Van Leusen Jan², Hauser J³, Decurtins Silvio³, Liu Shi-Xia³, Kogerler Paul², Baca Svetlana¹

¹ Institute of Applied Physics,
² RWTH Aachen University,
³ University of Bern

Disponibil în IBN: 18 aprilie 2019

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In the presence of dicyanamide and N-butyldiethanolamine (bdeaH ₂ ), Fe(III) and Dy(III) precursors self-assemble into the charge-neutral coordination cluster [Fe ₆ Dy ₃ (ib) ₉ (bdea) ₆ (MeO) ₆ ]·MeOH (1) (ib: isobutyrate) featuring an approximately C ₃ -symmetric wheel of edge-sharing FeO ₆ and DyO ₆ N ₂ polyhedra. This is followed by a remarkable self-induced conversion of this cluster into the highly condensed globe-shaped coordination cluster [Fe ₇ Dy ₄ O ₄ (OH) ₃ (ib) _9.25 (bdea) ₆ (NO ₃ ) _0.75 (H ₂ O)] (2) in methanolic solution under ambient conditions. The transition from {Fe ₆ Dy ₃ } to {Fe ₇ Dy ₄ } coincides with a slowdown of the clusters' magnetization dynamics, as evident from a shift of the onset of significant out-of-phase components of their magnetic ac susceptibility from 3.6 K up to 12 K (1000 Hz) in the absence of a static bias field.

Cuvinte-cheie
Dysprosium compounds, magnetic susceptibility, wheels

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<cfAbstr cfLangCode='EN' cfTrans='o'><p>In the presence of dicyanamide and N-butyldiethanolamine (bdeaH <sub>2</sub> ), Fe(III) and Dy(III) precursors self-assemble into the charge-neutral coordination cluster [Fe <sub>6</sub> Dy <sub>3</sub> (ib) <sub>9</sub> (bdea) <sub>6</sub> (MeO) <sub>6</sub> ]&middot;MeOH (1) (ib: isobutyrate) featuring an approximately C <sub>3</sub> -symmetric wheel of edge-sharing FeO <sub>6</sub> and DyO <sub>6</sub> N <sub>2</sub> polyhedra. This is followed by a remarkable self-induced conversion of this cluster into the highly condensed globe-shaped coordination cluster [Fe <sub>7</sub> Dy <sub>4</sub> O <sub>4</sub> (OH) <sub>3</sub> (ib) <sub>9.25</sub> (bdea) <sub>6</sub> (NO <sub>3</sub> ) <sub>0.75</sub> (H <sub>2</sub> O)] (2) in methanolic solution under ambient conditions. The transition from {Fe <sub>6</sub> Dy <sub>3</sub> } to {Fe <sub>7</sub> Dy <sub>4</sub> } coincides with a slowdown of the clusters&#39; magnetization dynamics, as evident from a shift of the onset of significant out-of-phase components of their magnetic ac susceptibility from 3.6 K up to 12 K (1000 Hz) in the absence of a static bias field.</p></cfAbstr>
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