Dysprosium(III) complexes with a square-antiprism configuration featuring mononuclear single-molecule magnetic behaviours based on different beta-diketonate ligands and auxiliary ligands
文献类型：期刊论文
| 作者 | Zhang, Sheng2,4; Ke, Hongshan2; Shi, Quan3; Zhang, Jangwei1; Yang, Qi2; Wei, Qing2; Xie, Gang2; Wang, Wenyuan2; Yang, Desuo4; Chen, Sanping2 |
| 刊名 | DALTON TRANSACTIONS
 |
| 出版日期 | 2016 |
| 卷号 | 45期号:12页码:5310-5320 |
| ISSN号 | 1477-9226 |
| DOI | 10.1039/c6dt00219f |
| 文献子类 | Article |
| 英文摘要 | Three mononuclear dysprosium(III) complexes derived from three beta-diketonate ligands, 4,4,4-trifluoro-1-(4-methylphenyl)-1,3-butanedione (tfmb), 4,4,4-trifluoro-1-(4-fluorophenyl)-1,3-butanedione (tffb) and 4,4,4-trifluoro-1-(2-naphthyl)-1,3-butanedione (tfnb) as well as auxiliary ligands, 5-nitro-1,10-phenanthroline (5-NO2-Phen), DMF and 2,2'-bipyridine (bpy) have been synthesized and structurally characterized, namely [Dy(5-NO2-Phen)(tfmb)(3)] (1), [Dy(DMF)(2)(tffb)(3)] (2) and [Dy(bpy)(2)(tfnb)(3)]center dot 0.5(1,4-dioxane) (3). The metal ions in 1-3 adopt an approximately square-antiprismatic (SAP) coordination environment with D-4d axial symmetry. The magnetic properties of 1-3 have been investigated, displaying weak out-of-phase AC signals under a zero-DC field. With an applied DC field of 1200 Oe, the quantum tunnelling of the magnetization was suppressed in 1-3 with the pre-exponential factor tau(0) = 5.3 x 10(-7) s and the effective barrier Delta E/k(B) = 83 K for 1 as well as the pre-exponential factor tau(0) = 3.09 x 10(-7) s and the effective barrier Delta E/k(B) = 39 K for 3. Interestingly, for the frequency dependence of the out-of-phase (chi'') of the AC susceptibility of 2, two slow relaxation of the magnetization processes occurred under the applied magnetic field of 1200 Oe, corresponding to the fast relaxation (FR) phase and slow relaxation (SR) phase, respectively. Arrhenius analysis gave the effective energy barrier (Delta E/k(B)) of 55 K and the pre-exponential factor (tau(0)) of 8.23 x 10(-12) for the SR. It is thus very likely that the FR process in complex 2 results from QTM enhanced by dipolar interactions between the Dy ions or the presence of the applied field. The structure-property relationship of some Dy(III) based mononuclear SMMs with the SAP configuration was further discussed. |
| WOS关键词 | ION MAGNET ; SLOW RELAXATION ; LANTHANIDE COMPLEXES ; ANISOTROPY BARRIER ; HIGH-SPIN ; SYMMETRY ; DY ; FIELD ; QUASI-D-5H ; DYNAMICS |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000372187700040 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/171108]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Chen, Sanping |
| 作者单位 | 1.Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China 2.Northwest Univ, Key Lab Synthet & Nat Funct Mol Chem, Minist Educ, Coll Chem & Mat Sci, Xian 710069, Shaanxi, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China 4.Baoji Univ Arts & Sci, Coll Chem & Chem Engn, Baoji 721013, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Sheng,Ke, Hongshan,Shi, Quan,et al. Dysprosium(III) complexes with a square-antiprism configuration featuring mononuclear single-molecule magnetic behaviours based on different beta-diketonate ligands and auxiliary ligands[J]. DALTON TRANSACTIONS,2016,45(12):5310-5320. |
| APA | Zhang, Sheng.,Ke, Hongshan.,Shi, Quan.,Zhang, Jangwei.,Yang, Qi.,...&Chen, Sanping.(2016).Dysprosium(III) complexes with a square-antiprism configuration featuring mononuclear single-molecule magnetic behaviours based on different beta-diketonate ligands and auxiliary ligands.DALTON TRANSACTIONS,45(12),5310-5320. |
| MLA | Zhang, Sheng,et al."Dysprosium(III) complexes with a square-antiprism configuration featuring mononuclear single-molecule magnetic behaviours based on different beta-diketonate ligands and auxiliary ligands".DALTON TRANSACTIONS 45.12(2016):5310-5320. |
入库方式： OAI收割
来源：大连化学物理研究所
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