Self-Assembled Bright Luminescent Lanthanide-Organic Polyhedra for Ratiometric Temperature Sensing
Self-Assembled Bright Luminescent Lanthanide-Organic Polyhedra for Ratiometric Temperature Sensing
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用于比例温度传感的自组装明亮发光镧系元素有机多面体
DOI：
10.1002/chem.201801132
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Qing-Fu Sun
中科院分区：
文献类型：
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作者：
Xiao-Qing Guo;Li-Peng Zhou;Li-Xuan Cai;Qing-Fu Sun
含镧系发光化合物有很多刺激应用。然而，多核稀土大厦的光学性质的微调仍然是一个很大的挑战。我们报道了一组明亮的稀土有机多面体(LOP)的配位自组装，通过两个具有三唑-吡啶-氨基(TPA)螯合部分的全共轭配体，很容易通过Click反应获得高的发射量子产率。用核磁共振谱、高分辨电喷雾飞行时间质谱仪和X射线结晶学对自组装的低聚物进行了表征。有趣的是，虽然金属中心相距近2 nm，但在混合稀土多面体分子上证实了金属间的能量转移(ET)。用Eu/TbLOPS混合发光材料证明了一种可行的比率发光温度计，其工作温度范围从低温到生理温度。我们预计这些分子水平的明亮发光中心的LOPS在显示、标记/成像、上转换材料等方面具有巨大的应用潜力。
Luminescent lanthanide‐containing compounds have a lot of stimulating applications. However, the fine‐tuning of the optical properties of multi‐nuclear lanthanide edifices is still a big challenge. We report here the coordination self‐assembly of a group of bright luminescent lanthanide organic polyhedra (LOPs) with record high emission quantum yields, by using two fully‐conjugated ligands featuring the triazole‐pyridine‐amido (tpa) chelating moiety, easily‐accessible from the “Click” reaction. The self‐assembledLOPsare characterized by NMR spectroscopy, high‐resolution ESI‐TOF‐MS, and X‐ray crystallography. Interestingly, inter‐metal energy transfer (ET) is confirmed on the mixed‐lanthanide polyhedral molecules, though the metal centers are separated nearly 2 nm apart. A feasible ratiometric luminescent thermometer, with work range from cryogenic to physiological temperatures, has been demonstrated with the mixed Eu/TbLOPs. We envisage these molecular‐level bright luminescentLOPshave great application potential in displaying, labelling/imaging, up‐conversion materials etc.