Zhang Binbin, Dong Xuelin, Xiong Yuxiang, Zhou Qi, Lu Shan, Liao Yonggui, Yang Yajiang, Wang Hong
Key Laboratory of Materials Chemistry for Energy Conversion and Storage of the Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Key Laboratory of Rare Mineral Exploration and Utilization, Ministry of Land and Resources, Geological Experimental Testing Center of Hubei Province, Wuhan 430034, China.
Dalton Trans. 2020 Mar 3;49(9):2827-2832. doi: 10.1039/c9dt04713a.
Preparing luminescence-stable lanthanide materials in a facile manner has always been an intriguing challenge. Herein we report an easy approach to the preparation of a heat-set lanthanide-based metallogel (H6L/Tb gel) with stable luminescence from 5,5',5''-(1,3,5-triazine-2,4,6-triyl)tris(azanediyl) triisophthalate (H6L) as a Tb3+ coordinating ligand. The heat-set H6L/Tb gel exhibits luminescence that mostly retains its intensity in the 0-90 °C temperature range and under mechanical stimulus. In addition, the H6L/Tb xerogel is also luminescent in aqueous solution. UV-vis and FT-IR spectroscopy and XRD studies reveal that the stable luminescence of the H6L/Tb gel depends on heat-set-induced strong hydrogen bonding, π-π stacking, and metal-ligand interactions. This study provides a heat-set approach to the preparation of luminescence-stable metallogel materials, such metallogels are potentially useful in anti-counterfeiting and sensing fields, among others.
以简便的方式制备发光稳定的镧系元素材料一直是一个引人关注的挑战。在此，我们报告了一种简单的方法来制备基于热固性镧系元素的金属凝胶（H6L/Tb凝胶），该凝胶具有稳定的发光性能，其使用5,5',5''-(1,3,5-三嗪-2,4,6-三基)三(氮杂二基)三间苯二甲酸酯（H6L）作为Tb3+配位配体。热固性H6L/Tb凝胶的发光在0-90°C温度范围内和机械刺激下大多能保持其强度。此外，H6L/Tb干凝胶在水溶液中也能发光。紫外-可见光谱、傅里叶变换红外光谱和X射线衍射研究表明，H6L/Tb凝胶的稳定发光取决于热固性诱导的强氢键、π-π堆积和金属-配体相互作用。本研究提供了一种热固性方法来制备发光稳定的金属凝胶材料，这种金属凝胶在防伪和传感等领域可能具有潜在用途。
