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Muslim Indo-African Studies Center

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Single Molecule Toroics: Synthetic Strategies, ...

Abstract:Single-molecule magnets involving monometallic 4f complexes have been investigated extensively in last two decades to understand the factors that govern the slow magnetization relaxation behavior in these complexes and to establish a magneto-structural correlation. The prime goal in this direction is to suppress the temperature independent quantum tunneling of magnetization (QTM) effect via fine-tuning the coordination geometry/microenvironment. Among the various coordination geometries that have been pursued, complexes containing high coordination number around Ln(III) are sparse. Herein, we present a summary of the various synthetic strategies that were used for the assembly of 10- and 12-coordinated Ln(III) complexes. The magnetic properties of such complexes are also described.Keywords: high-coordinate Ln(III) complexes; multi-dentate ligands; single-ion magnets; quantum tunneling of magnetization

Single Molecule Toroics: Synthetic Strategies, ...

1.Peng Zhang, Li Zhang, Chao Wang, Shufang Xue, Shuang-Yan Lin, Jinkui Tang,* Equatorially Coordinated Lanthanide Single Ion Magnets, J. Am. Chem. Soc., 2014, 136, 4484-44872.Liviu Ungur, Shuang-Yan Lin, Jinkui Tang,* Liviu F. Chibotaru, Single-molecule toroics in Ising-type lanthanide molecular clusters, Chem. Soc. Rev., 2014, 43, 6894-69053.Yun-Nan Guo, Liviu Ungur, Garrett E. Granroth, Annie K. Powell, Chunji Wu, Stephen E. Nagler, Jinkui Tang,* Liviu F. Chibotaru,* Dongmei Cui,* An NCN-pincer ligand dysprosium single-ion magnet showing magnetic relaxation via the second excited state, Sci. Rep., 2014, 4, 54714.Peng Zhang, Yun-Nan Guo, Jinkui Tang,* Recent advances in dysprosium-based single molecule magnets: Structural overview and synthetic strategies, Coord. Chem. Rev., 2013, 257, 1728-17635.Shuang-Yan Lin, Wolfgang Wernsdorfer, Liviu Ungur, A. K. Powell, Yun-Nan Guo, Jinkui Tang,* Lang Zhao, L. F. Chibotaru,* Hong-Jie Zhang,* Coupling Dy3 triangles maximizes the toroidal moment, Angew. Chem.-Int. Ed., 2012, 51, 12767-127716.Yun-Nan Guo, Gong-Feng Xu, Wolfgang Wernsdorfer, Liviu Ungur, Jinkui Tang,* Yang Guo, Hong-Jie Zhang,* Liviu F. Chibotaru,* Annie K. Powell, Strong Axiality and Ising Exchange Interaction Suppress Zero-Field Tunneling of Magnetization of an Asymmetric Dy2 Single-Molecule Magnet, J. Am. Chem. Soc., 2011, 133, 11948-119517.Yun-Nan Guo, Gong-Feng Xu, Patrick Gamez, Lang Zhao, Shuang-Yan Lin, Ruiping Deng, Jinkui Tang,* Hong-Jie Zhang,* Two-Step Relaxation in a Linear Tetranuclear Dysprosium(III) Aggregate Showing Single-Molecule Magnet Behavior, J. Am. Chem. Soc., 2010, 132, 8538-85398.Jinkui Tang, Ian Hewitt, N. T. Madhu, Guillaume Chastanet, Wolfgang Wernsdorfer, Christopher E. Anson, Cristiano Benelli, Roberta Sessoli, Annie K. Powell,* Dysprosium triangles showing Single Molecule Magnet behaviour of thermally excited spin states, Angew. Chem. Int. Ed., 2006, 45, 1729-1733 041b061a72

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