Triboluminescence of Lanthanide Coordination Polymers with Face-to-Face Arranged Substituents
Triboluminescence of Lanthanide Coordination Polymers with Face-to-Face Arranged Substituents
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DOI：
10.1002/anie.201703638
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发表时间：
2017-06-12
影响因子：
16.6
通讯作者：
Hasegawa, Yasuchika
中科院分区：
文献类型：
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作者：
Hirai, Yuichi;Nakanishi, Takayuki;Hasegawa, Yasuchika
固体材料的研磨发光(Tl)一直是自然科学中一个令人困惑的现象，也因其在光学上的广泛应用而引起人们的关注。人们普遍认为，热释光光谱与光致发光(PL)光谱具有相似的轮廓，尽管它们来自不同的刺激。在这里，我们首次使用具有有效的TL和PL性质的稀土(III)配位聚合物描述了这两种物理现象之间的巨大光谱差异。它们由发射中心(Tb-III和Eu-III离子)、天线(六氟乙酰丙酮=HFA)和桥联配体(2，5-双(二苯基磷酰基)呋喃=DPF)组成。在Tb-III/Eu-III-混合配位聚合物[Tb，Eu(HFA)(3)(DPF)](N)(Tb/Eu=1)中，研磨后的发射颜色(黄色TL)明显不同于紫外光照射下的发射颜色(红橙色PL)。结果直接反映了PL和TL的离散激发过程。
Luminescence upon the grinding of solid materials (triboluminescence, TL) has long been a puzzling phenomenon in natural science and has also attracted attention because of its broad application in optics. It has been generally considered that the TL spectra exhibit similar profiles as those of photoluminescence (PL), although they occur from distinct stimuli. Herein, we describe for the first time a large spectral difference between these two physical phenomena using lanthanide(III) coordination polymers with efficient TL and PL properties. They are composed of emission centers (Tb-III and Eu-III ions), antenna (hexafluoroacetylacetonate=hfa), and bridging ligands (2,5-bis(diphenylphosphoryl)furan=dpf). The emission color upon grinding (yellow TL) is clearly different from that upon UV irradiation (reddish-orange PL) in Tb-III/Eu-III-mixed coordination polymers [Tb,Eu(hfa)(3)(dpf)](n) (Tb/Eu=1). The results directly indicate the discrete excitation processes of PL and TL.