Six‐Coordinate Lanthanide Complexes: Slow Relaxation of Magnetization in the Dysprosium(III) Complex |
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| Authors: | Dr Bo Na Xue‐Jing Zhang Prof?Dr Wei Shi Prof?Dr Yi‐Quan Zhang Prof?Dr Bing‐Wu Wang Chen Gao Prof?Dr Song Gao Prof?Dr Peng Cheng |
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| Institution: | 1. Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE) and Collaborative Innovation Center of Chemical Science, and Engineering (Tianjin), Nankai University, Tianjin 300071 (P. R. China), Fax: (+86)?22‐23502458;2. Beijing National Laboratory of Molecular Science, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (P. R. China) |
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| Abstract: | A series of six‐coordinate lanthanide complexes {(H3O)Ln(NA)2]?H2O}n (H2NA=5‐hydroxynicotinic acid; Ln=GdIII ( 1?Gd ); TbIII ( 2?Tb ); DyIII ( 3?Dy ); HoIII ( 4?Ho )) have been synthesized from aqueous solution and fully characterized. Slow relaxation of the magnetization was observed in 3?Dy . To suppress the quantum tunneling of the magnetization, 3?Dy diluted by diamagnetic YIII ions was also synthesized and magnetically studied. Interesting butterfly‐like hysteresis loops and an enhanced energy barrier for the slow relaxation of magnetization were observed in diluted 3?Dy . The energy barrier (Δτ) and pre‐exponential factor (τ0) of the diluted 3?Dy are 75 K and 4.21×10?5 s, respectively. This work illustrates a successful way to obtain low‐coordination‐number lanthanide complexes by a framework approach to show single‐ion‐magnet‐like behavior. |
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| Keywords: | dysprosium lanthanide complexes magnetization slow relaxation structure elucidation |
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