文献类型：期刊文献

英文题名：Two novel Dy-8 and Dy-11 clusters with cubane [Dy-4(mu(3)-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]Sun Yat Sen Univ, Key Lab Bioinorgan & Synthet Chem, Minist Educ, State Key Lab Optoelect Mat & Technol,Sch Chem &, Guangzhou 510275, Guangdong, Peoples R China;[2]Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China;[3]Jilin Univ, Changchun 130012, Peoples R China

年份：2011

卷号：40

期号：39

起止页码：10229

外文期刊名：DALTON TRANSACTIONS

收录：SCI-EXPANDED(收录号：WOS:000295843100033)、、WOS

基金：This work was supported by the NSFC (grant nos 20821001, 50872157 and 90922009) and the "973 Project" (2007CB815305).

语种：英文

外文摘要：Two unique octa-and hendeca-nuclear dysprosium(III) clusters incorporating [Dy-4(m(3)-OH)(4)](8+) cubane units have been synthesized with the 1,10-phenanthroline-2,9-dicarbaldehyde dioxime (H(2)phendox) ligand and DyCl3 center dot 6H(2)O or Dy(OAc)(3)center dot 4H(2)O. They are [Dy-8(OH)(8)(phendox)(6)(H2O)(8)]Cl-2(OH)(2)center dot 18H(2)O center dot 18MeOH (1) and [Dy-11(OH)(11)(phendox)(6)(phenda)(3)(OAc)(3)](OH)center dot 40H(2)O center dot 7MeOH (2). Adjacent Dy-8 in 1 or Dy-11 in 2 motifs are packed by off-set pi-pi interactions of the aromatic rings on phendox(2-) 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, N-2, 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).