College of Basic Sciences, Huazhong Agricultural University, Wuhan, Hubei 430070, China.
Henan Province Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang, Henan 455002, China.
Inorg Chem. 2020 Sep 21;59(18):13067-13077. doi: 10.1021/acs.inorgchem.0c00606. Epub 2020 Sep 1.
Luminescent thermochromic materials with a dramatic shift of emission band under different temperatures are highly desirable in temperature sensing fields. However, the design of the synthesis of such compounds remains a great challenge. In this work, two new luminescent thermochromic silver iodides, (emIm)AgI () and (emIm)AgI () (emIm = 1-ethyl-3-methyl imidazole), have been synthesized under solvothermal conditions. Compound features a [AgI] anionic layer, while compound possesses an infinite [AgI] chain structure, both of which are charge balanced by emIm cations. Particularly, they display luminescent thermochromism with a significant wavelength shift of emission maximum with temperature change. They represent rare examples of infinite layered or chain silver iodides that show luminescent thermochromism. Furthermore, the results indicate that compounds and are promising wavelength-dependent luminescent thermometers.
具有在不同温度下发射带发生显著移动的发光热致变色材料在温度传感领域非常理想。然而，此类化合物的合成设计仍然是一个巨大的挑战。在这项工作中，我们在溶剂热条件下合成了两种新型发光热致变色碘化银，（emIm）AgI（）和（emIm）AgI（）（emIm = 1-乙基-3-甲基咪唑）。化合物 具有 [AgI] 阴离子层，而化合物 具有无限的 [AgI] 链结构，它们都由 emIm 阳离子平衡电荷。特别地，它们表现出发光热致变色性，随着温度变化发射带的最大波长发生显著位移。它们代表了具有发光热致变色性的无限层状或链状碘化银的罕见例子。此外，结果表明化合物 和 是有前途的波长依赖性发光温度计。
