通过磁位稀释方法实现双功能荧光温度计和单离子磁体。
A magnetic site dilution approach to achieve bifunctional fluorescent thermometers and single-ion magnets.
机构信息
School of Chemistry and Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin Key Laboratory of Drug Targeting and Bioimaging, Tianjin University of Technology, Tianjin, China 300384.
College of Chemistry, Key Laboratory of inorganic-organic hybrid Functional Material Chemistry, Tianjin Normal University, Tianjin 300387, China.
出版信息
Dalton Trans. 2021 Feb 7;50(4):1307-1312. doi: 10.1039/d0dt04058d. Epub 2021 Jan 5.
In complex [Na-Dy(μ-L)](HL = 8-hydroxyquinoline) (1), the DyL units were linked by the Na ions to form one-dimensional chains. The chain exhibited slow magnetic relaxation behavior at low temperature, accompanied by obvious quantum tunneling of magnetization (QTM). Very weak fluorescence was detected in 1 due to the mismatch of the state energy between Dy and the L ligand. Through the magnetic dilution of diamagnetic Y ions, complex [NaDyY(μ-L)] (2) was obtained; in 2 the QTM of Dy was suppressed and the single ion magnet (SIM) behavior was enhanced. More interestingly, the fluorescence emission of 8-hydroxyquinoline was lightened by the Y ions in 2, whose intensity is linearly correlated with the temperature variation. The examples of dual functional fluorescent thermometers and SIM materials are attained simply by ion dilution, achieving the effect of killing two birds with one stone.
在配合物 [Na-Dy(μ-L)]（HL = 8-羟基喹啉）（1）中，DyL 单元通过 Na 离子连接形成一维链。该链在低温下表现出缓慢的磁弛豫行为，伴随着明显的磁量子隧道效应（QTM）。由于 Dy 和 L 配体之间的态能不匹配，在 1 中检测到非常微弱的荧光。通过引入抗磁性 Y 离子进行磁稀释，得到了配合物 [NaDyY(μ-L)]（2）；在 2 中，Dy 的 QTM 被抑制，单离子磁体（SIM）行为得到增强。更有趣的是，2 中 Y 离子使 8-羟基喹啉的荧光发射变亮，其强度与温度变化呈线性相关。通过离子稀释获得了双功能荧光温度计和 SIM 材料的实例，简单地实现了一石二鸟的效果。
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