期刊
INORGANIC CHEMISTRY COMMUNICATIONS
卷 102, 期 -, 页码 16-19出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.inoche.2019.02.003
关键词
Single-ion magnet; Luminescence; Lanthanide; Slow magnetic relaxation
资金
- National Natural Science Foundation of China [21620102002, 21771200]
- Pearl River Talent Plan of Guangdong [2017BT01C161]
In 2016, our group first reported a single-ion magnet (SIM) [Dy(bbpen)Br] (H(2)bbpen = N,N'-bis(2-hydroxybenzyl)-N,N'-bis(2-methylpyridyl)ethylenediamine) with the highest effective energy barrier (U-eff) over 1000 K. To explore further for the high performance single-ion magnets (SIMs), we used functional ligand to replace the Br- anion. The H(2)bbpen and 4'-(1,2,2-triphenylvinyl)benzoic acid (tpe-COOH) ligand with aggregation-induced-emission-active (AIE) property, formed a triangular dodecahedral SIM, [Dy(bbpen)(tpe-COOH)]center dot 2MeOH. The structural, magnetic and luminescent properties of the SIM have been investigated. Related to its lower local symmetry around Dy(III) ion, the U-eff was sharply reduced to 77 K under an external dc field of 0.15 T. Therefore, it proved the importance of local symmetry to get the high performance SIMs from the opposite side.
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