Institut des Matériaux Jean Rouxel (IMN), Université de Nantes, CNRS, 2 rue de la Houssinière, BP 32229, 44322 Nantes Cedex 3, France.
Sci Rep. 2017 Mar 30;7:45537. doi: 10.1038/srep45537.
Thermochromic luminescent compounds with d metal ions are interesting materials for applications such as sensors or display devices. However, these properties are difficult to predict prior to their synthesis. In this communication, we investigated materials with structural assemblies known to be responsible of distinct luminescence mechanisms and show that they can be interesting potential thermometers. Thus, we compared the synthesis of a zinc halide and a copper halide based compounds which only differ in their ability to create clusters with metallophilic interactions. The compounds synthesized by hydrothermal method have been structurally characterized by Single-crystal X-ray diffraction, Solid-State NMR, FTIR, UV-Visible spectroscopy, thermal analysis and EPR. The photoluminescence properties of the two materials have been characterized at different temperatures. The copper bromide compound shows luminescence thermochromism in a wide spectrum of colors owing to the formation of clusters generating multi-emission bands while the zinc bromide exhibits a single emission band and no thermochromism.
具有 d 金属离子的热致变色发光化合物是一类有趣的材料，可应用于传感器或显示设备等领域。然而，在合成之前，这些性质很难预测。在本通讯中，我们研究了具有已知结构组装的材料，这些结构组装负责不同的发光机制，并表明它们可能是有前途的潜在温度计。因此，我们比较了两种卤化锌和卤化铜化合物的合成，这两种化合物仅在形成具有金属亲合相互作用的簇的能力上有所不同。通过水热法合成的化合物通过单晶 X 射线衍射、固态 NMR、FTIR、UV-可见光谱、热分析和 EPR 进行了结构表征。两种材料的荧光性质在不同温度下进行了表征。由于形成了产生多发射带的簇，铜溴化物化合物在很宽的光谱范围内显示出发光热致变色现象，而锌溴化物则表现出单一的发射带，没有热致变色现象。
