A Spontaneous Condensation Sequence from a {Fe 6 Dy 3 } Wheel to a {Fe 7 Dy 4 } Globe
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BOTEZAT, Olga; VAN LEUSEN, Jan; HAUSER, J; DECURTINS, Silvio; LIU, Shixia; 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.
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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: 10.1021/acs.cgd.8b01668
Pag. 2097-2103

Botezat Olga12, Van Leusen Jan2, Hauser J3, Decurtins Silvio3, Liu Shixia3, Kogerler Paul2, Baca Svetlana1
 
1 Institute of Applied Physics,
2 RWTH Aachen University,
3 University of Bern
 
Disponibil în IBN: 18 aprilie 2019


Rezumat

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