A substituent effect of phenylacetic acid coligand perturbed structures and magnetic properties observed in two triple-bridged azido-Cu(II) chain compounds with ferromagnetic ordering and slow magnetic relaxation
文献类型：期刊论文
| 作者 | Liu, Xiangyu2; Ma, Xiaohui2; Cen, Peipei1,2; Wu, Yuewei2; Zhang, Chengcheng2; Shi, Quan3; Song, Weiming2; Xi, Gang1; Chen, Sanping1 |
| 刊名 | DALTON TRANSACTIONS
 |
| 出版日期 | 2017-06-21 |
| 卷号 | 46页码:7556-7566 |
| DOI | 10.1039/c7dt01338h |
| 英文摘要 | Based on two fluoro-substituted phenylacetate isomers, o-fluorophenylacetic acid (o-Hfpa) and p-fluorophenylacetic acid (p-Hfpa), two new Cu(II)-azido compounds, [Cu(o-fpa)(N-3)(C2H5OH)](n) (1) and [Cu(p-fpa)(N-3)(C2H5OH)](n) (2), have been prepared, and structurally and magnetically characterized. Single- crystal structure analyses indicate that compounds 1 and 2 consist of 1D chain-like coordination networks in which adjacent copper cations are linked by the alternating triple-bridges of mu-1,1-azido, syn, syn-carboxylate and mu 2-ethanol. For the two title compounds, the diverse charge distributions on the carboxyl groups caused by distinct substituent effects of the two phenylacetate coligands lead to the different structural parameters of intrachain Cu-Cu distances (3.218 angstrom for 1 and 3.168 angstrom for 2) and Cu-N-Cu angles (106.82(omicron) for 1 and 104.81(omicron) for 2), further resulting in the disparity of magnetic behaviors. The dominant ferromagnetic couplings between neighbouring Cu(II) ions in the two compounds (J = 87.08 cm(-1) for 1, J = 66.05 cm(-1) for 2) are due to the counter-complementarity of the multiple superexchange pathways, contributing to the interesting plots of a ferromagnetic order (T-c = 11.0 K for 1, 9.5 K for 2) and slow magnetic relaxation that are rarely observed in most of the reported azido-Cu(II) architectures. Heat-capacity experiments further emphasize the characteristic long-range ferromagnetic ordering in compounds 1 and 2. Magneto-structural relationships of 1 and 2 are investigated as well. Moreover, DFT calculations (using different methods and basis sets) have been performed on both compounds to provide a qualitative and quantitative theoretical explanation of their magnetic behavior. |
| 语种 | 英语 |
| WOS记录号 | WOS:000403436200022 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/152114]  |
| 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 |
| 作者单位 | 1.Northwest Univ Xian, Coll Chem & Mat Sci, Minist Educ, Key Lab Synthet & Nat Funct Mol Chem, Xian 710069, Peoples R China 2.Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efficiency Coal Utilizat & Gre, Yinchuan 750021, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, 457 Zhongshan Rd, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiangyu,Ma, Xiaohui,Cen, Peipei,et al. A substituent effect of phenylacetic acid coligand perturbed structures and magnetic properties observed in two triple-bridged azido-Cu(II) chain compounds with ferromagnetic ordering and slow magnetic relaxation[J]. DALTON TRANSACTIONS,2017,46:7556-7566. |
| APA | Liu, Xiangyu.,Ma, Xiaohui.,Cen, Peipei.,Wu, Yuewei.,Zhang, Chengcheng.,...&Chen, Sanping.(2017).A substituent effect of phenylacetic acid coligand perturbed structures and magnetic properties observed in two triple-bridged azido-Cu(II) chain compounds with ferromagnetic ordering and slow magnetic relaxation.DALTON TRANSACTIONS,46,7556-7566. |
| MLA | Liu, Xiangyu,et al."A substituent effect of phenylacetic acid coligand perturbed structures and magnetic properties observed in two triple-bridged azido-Cu(II) chain compounds with ferromagnetic ordering and slow magnetic relaxation".DALTON TRANSACTIONS 46(2017):7556-7566. |
入库方式： OAI收割
来源：大连化学物理研究所
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