文献类型：期刊文献

英文题名：Two novel Dy8 and Dy11 clusters with cubane [Dy 4(μ3-OH)4]8+ units exhibiting slow magnetic relaxation behaviour

作者：Miao, Yan-Li[1,2]; Liu, Jun-Liang[1]; Li, Jin-Yan[1]; Leng, Ji-Dong[1]; Ou, Yong-Cong[1]; Tong, Ming-Liang[1,3]

机构：[1] State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Ministry of Education, Guangzhou 510275, China; [2] College of Science, Guangdong Ocean University, Zhanjiang 524088, China; [3] Jilin University, Changchun 130012, China

年份：2011

卷号：40

期号：39

起止页码：10229

外文期刊名：Dalton Transactions

收录：EI(收录号：20114014398363)

语种：英文

外文关键词：Magnetism - Molecules - Carbon dioxide - Magnetic relaxation

外文摘要：Two unique octa- and hendeca-nuclear dysprosium(iii) clusters incorporating [Dy4(μ3-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]Cl 2(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 (H 2, 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). ? The Royal Society of Chemistry 2011.