Synthesis, Structures, and Magnetic Properties of End-to-End Azide-Bridged Manganese(III) Chains: Elucidation of Direct Magnetostructural Correlation

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• 作者：Jeong Hwa Song ; Kwang Soo Lim ; Dae Won Ryu ; Sung Won Yoon ; Byoung Jin Suh ; Chang Seop Hong
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：August 4, 2014
• 年：2014
• 卷：53
• 期：15
• 页码：7936-7940
• 全文大小：313K
• ISSN：1520-510X

文摘

The two one-dimensional chain compounds [Mn(L1)(N₃)]路H₂O (1路H₂O; H₂L1 = 2,2鈥?((1E,1鈥?i>E)-ethane-1,2-diylbis(azan-1-yl-1-ylidene))bis(phenylmethan-1-yl-1-ylidene)diphenol) and [Mn(L2)(N₃)] (2; H₂L2 = 2,2鈥?((1E,1鈥?i>E)-2,2-dimethylpropane-1,3-diyl)bis(azan-1-yl-1-ylidene)-bis(phenylmethan-1-yl-1-ylidene)diphenol) bridged by single end-to-end azides were prepared via a self-assembly process. Each Mn(III) ion exhibits a characteristic Jahn鈥揟eller elongation along the chain direction. For both compounds, antiferromagnetic interactions between Mn(III) spins within a chain are transmitted through the azide ligands, together with the apparent occurrence of spin canting at low temperatures. Remarkably, the coupling constants (J) for 1 and 2 exceed those reported for end-to-end azide-linked Mn(III) systems. A systematic magnetostructural relationship based on the torsion angle is established in terms of the torsion angle Mn鈥揘_ax路路路N_ax鈥揗n (ax = axial) for the first time.