On Approaching the Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal Dysprosium(III) Single-Molecule Magnet
On Approaching the Limit of Molecular Magnetic Anisotropy: A Near-Perfect Pentagonal Bipyramidal Dysprosium(III) Single-Molecule Magnet
复制标题
接近分子磁各向异性极限：近乎完美的五角双锥镝(III)单分子磁体
DOI：
10.1002/anie.201609685
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发表时间：
2016-12-23
影响因子：
16.6
通讯作者：
Zheng, Yan-Zhen
中科院分区：
文献类型：
--
作者：
Ding, You-Song;Chilton, Nicholas F.;Zheng, Yan-Zhen
本文报道了一种稀土镝配合物[Dy（（OBu）-Bu-t）（2）（py）（5）][BPh_4]（5），其磁弛豫的最大有效势垒为U-eff=1815（1）K。大规模的磁各向异性是由于双反式处理叔丁氧基配体与弱赤道吡啶捐助者，接近高温单分子磁体（SMM）的拟议计划。通过零场冷却磁化实验确定的阻断温度T-B为14 K，并且是任何单金属配合物中最大的，与[Tb_2N_2 {N（SiMe_3）（2）}（4）（THF）（2）]的当前记录相等。
We report a monometallic dysprosium complex, [Dy((OBu)-Bu-t)(2)(py)(5)][BPh4] (5), that shows the largest effective energy barrier to magnetic relaxation of U-eff=1815(1)K. The massive magnetic anisotropy is due to bis-trans-disposed tert-butoxide ligands with weak equatorial pyridine donors, approaching proposed schemes for high-temperature single-molecule magnets (SMMs). The blocking temperature, T-B, is 14K, defined by zero-field-cooled magnetization experiments, and is the largest for any monometallic complex and equal with the current record for [Tb2N2{N(SiMe3)(2)}(4)(THF)(2)].