Constructing Single-Chain Magnets by Supramolecular p-p Stacking and Spin Canting: A Case Study on Manganese(III) Corroles
文献类型：期刊论文
| 作者 | Ding, Mei1; Wang, Bingwu1; Wang, Zheming1; Zhang, Junlong1; Fuhr, Olaf2,3; Fenske, Dieter2,3; Gao, Song1 |
| 刊名 | CHEMISTRY-A EUROPEAN JOURNAL
 |
| 出版日期 | 2012 |
| 卷号 | 18期号:3页码:915-924 |
| 关键词 | Macrocyclic Ligands Magnetic Properties Manganese Pi Interactions Supramolecular Chemistry |
| ISSN号 | 0947-6539 |
| DOI | 10.1002/chem.201101912 |
| 英文摘要 | A single-chain magnet (SCM) was constructed from manganese(III) 5,10,15-tris(pentafluorophenyl) corrole complex [Mn-III-(tpfc)] through supramolecular pi-pi stacking without bridging ligands. In the crystal structures, [Mn(tpfc)] molecules crystallized from different solvents, such as methanol, ethyl acetate, and ethanol, exhibit different molecular orientations and intermolecular pi-pi interaction or weak Mn center dot center dot center dot O interaction to form a supramolecular one-dimensional motif or dimer. These three complexes show very different magnetic behaviors at low temperature. Methanol solvate 1 shows obvious frequency dependence of out-of-phase alternating-current magnetic susceptibility below 2 K and a magnetization hysteresis loop with a coercive field of 400 Oe at 0.5 K. It is the first example of spin-canted supramolecular single-chain magnet due to weak pi-pi stacking interaction. By fitting the susceptibility data chi T-M (20-300 K) of 1 with the spin Hamiltonian expression (H) over right arrow= -2J Sigma(n-1)(i=1) (S) over right arrow (Ai)(S) over right arrow (Ai+1) + D Sigma(i) (S) over right arrow (iZ2), the intrachain magnetic coupling parameter transmitted by pi-pi interaction of -0.31 cm(-1) and zero field splitting parameter D of -2.59 cm(-1) are obtained. Ethyl acetate solvate 2 behaves as an antiferromagnetic chain without ordering or slow magnetic relaxation down to 0.5 K. The magnetic susceptibility data chi T-M (20-300 K) of 2 was fitted by assuming the spin Hamiltonian (H) over right arrow= -2J Sigma(n-1)(i=1) (S) over right arrow (Ai) (S) over right arrow (Ai+1), and the intrachain antiferromagnetic coupling constant of -0.07 cm(-1) is much weaker than that of 1. Ethanol solvate 3 with a dimer motif shows field-induced single-molecule magnet like behavior below 2.5 K. The exchange coupling constant J within the dimer propagated by pi-pi interaction is -0.14 cm(-1) by fitting the susceptibility data cMT (20-300 K) with the spin Hamiltonian (H) over right arrow=-2J (S) over right arrow (A)(S) over right arrow (B)+ beta((S) over right arrow (AgA)+ (S) over right arrow (BgB)) H. The present studies open a new way to construct SCMs from anisotropic magnetic single-ion units through weak intermolecular interactions in the absence of bridging ligands. |
| 语种 | 英语 |
| WOS记录号 | WOS:000298919400023 |
| 出版者 | WILEY-BLACKWELL |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/47745]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wang, Bingwu |
| 作者单位 | 1.Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Applicat, Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Inst Nanotechnol, Karlsruher Inst Technol KIT, D-76021 Karlsruhe, Germany 3.Inst Anorgan Chem, D-76021 Karlsruhe, Germany |
| 推荐引用方式 GB/T 7714 | Ding, Mei,Wang, Bingwu,Wang, Zheming,et al. Constructing Single-Chain Magnets by Supramolecular p-p Stacking and Spin Canting: A Case Study on Manganese(III) Corroles[J]. CHEMISTRY-A EUROPEAN JOURNAL,2012,18(3):915-924. |
| APA | Ding, Mei.,Wang, Bingwu.,Wang, Zheming.,Zhang, Junlong.,Fuhr, Olaf.,...&Gao, Song.(2012).Constructing Single-Chain Magnets by Supramolecular p-p Stacking and Spin Canting: A Case Study on Manganese(III) Corroles.CHEMISTRY-A EUROPEAN JOURNAL,18(3),915-924. |
| MLA | Ding, Mei,et al."Constructing Single-Chain Magnets by Supramolecular p-p Stacking and Spin Canting: A Case Study on Manganese(III) Corroles".CHEMISTRY-A EUROPEAN JOURNAL 18.3(2012):915-924. |
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来源：化学研究所
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