Issue 39, 2011

Two novel Dy8 and Dy11 clusters with cubane [Dy43-OH)4]8+ units exhibiting slow magnetic relaxation behaviour

Abstract

Two unique octa- and hendeca-nuclear dysprosium(III) clusters incorporating [Dy43-OH)4]8+ cubane units have been synthesized with the 1,10-phenanthroline-2,9-dicarbaldehyde dioxime (H2phendox) ligand and DyCl3·6H2O or Dy(OAc)3·4H2O. They are [Dy8(OH)8(phendox)6(H2O)8]Cl2(OH)2·18H2O·18MeOH (1) and [Dy11(OH)11(phendox)6(phenda)3(OAc)3](OH)·40H2O·7MeOH (2). Adjacent Dy8 in 1 or Dy11 in 2 motifs are packed by off-set π–π interactions of the aromatic rings on phendox2− to generate a 3D supramolecular architecture in the honeycomb topology and with 1D or 3D channels along the c-axis. Adsorption research shows that complex 1 has selective adsorption ability for H2O over small gas molecules (H2, N2, CO2). Complex 2 is stable upon the removal of guest molecules and the desolvated compound absorbed a considerable amount of CO2. Furthermore, the oximes underwent hydrolysis to carboxylic acid and the resulting 1,10-phenanthroline-2,9-dicarboxylate link the dysprosium atoms to form a hendecanuclear cluster of 2. Magnetic studies reveal that both clusters exhibit slow magnetic relaxation behavior, expanding upon the recent reports of the pure 4f type single-molecule magnets (SMMs).

Graphical abstract: Two novel Dy8 and Dy11 clusters with cubane [Dy4(μ3-OH)4]8+ units exhibiting slow magnetic relaxation behaviour

Supplementary files

Article information

Article type
Paper
Submitted
10 Apr 2011
Accepted
22 Jul 2011
First published
06 Sep 2011

Dalton Trans., 2011,40, 10229-10236

Two novel Dy8 and Dy11 clusters with cubane [Dy43-OH)4]8+ units exhibiting slow magnetic relaxation behaviour

Y. Miao, J. Liu, J. Li, J. Leng, Y. Ou and M. Tong, Dalton Trans., 2011, 40, 10229 DOI: 10.1039/C1DT10613A

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