Modulating Magnetic Dynamics of Dy2 System through the Coordination Geometry and Magnetic Interaction

详细信息    查看全文

• 作者：Peng Zhang ; Li Zhang ; Shuang-Yan Lin ; Shufang Xue ; Jinkui Tang
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：April 15, 2013
• 年：2013
• 卷：52
• 期：8
• 页码：4587-4592
• 全文大小：408K
• 年卷期：v.52,no.8(April 15, 2013)
• ISSN：1520-510X

文摘

Two new dinuclear dysprosium compounds, [Dy₂(HL₁)₂(PhCOO)₂(CH₃OH)₂] (1) and [Dy₂(L₂)₂(NO₃)₂(CH₃OH)₂]路2CH₃OH路4H₂O (2), have been assembled through applying two ligands with different coordination pockets. The different features of ligands H₃L₁ and H₂L₂ result in the distinct coordination geometry of the metal ions in their respective structures. The Dy ions of complexes 1 and 2 were linked by the alkoxide- and hydrazone-O, and display the hula hoop-like and the broken hula hoop-like coordination geometry, respectively. Consequently, these two compounds show distinct magnetic properties. Complex 1 behaves as a single molecule magnet (SMM) with rather slow quantum tunneling rate (蟿 > 274 ms), while no SMM behavior was observed for complex 2. In addition, the comparison of the structural parameters among the similar Dy₂ SMMs with hula hoop-like geometry reveals the significant role played by coordination geometry and magnetic interaction in modulating the relaxation dynamics of SMMs.