Yang Jing, Wang Tingting, Guo Ran, Yao Decui, Guo Weiwei, Liu Shuo, Li Zhiqiang, Wang Yige, Li Huanrong
National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin Key Laboratory of Chemical Process Safety, School of Chemical Engineering and Technology, Hebei University of Technology, Guangrong Dao 8, Hongqiao District, Tianjin 300130, P. R. China.
College of Chemistry, Nankai University, Tianjin 300350, P. R. China.
ACS Appl Mater Interfaces. 2020 Dec 2;12(48):54026-54034. doi: 10.1021/acsami.0c13509. Epub 2020 Nov 19.
Luminescent materials with dynamic responsiveness to external stimuli have attracted extensive attention for the development of advanced sensors and smart materials; however, self-healing capability is also of great importance for functional soft materials. An acid/base vapor reversibly triggered luminescence switch with self-healing ability is achieved by incorporating dynamic lanthanide metal-ligand (Ln-L) coordination into the soft polydimethylsiloxane polymer network. The emission color of the resultant luminescent material could be modulated by altering either the Eu/Tb molar ratio or the excitation wavelength. The luminescence "On-Off" reversible switch is realized via direct alternating exposure to acid and base vapor, realizing reversible information encryption and decryption. The dynamic Ln-L cross-link as well as the hydrogen bond in the luminescent material endow it with excellent self-healing capability, high toughness, and stretchability. We believe this acid/base vapor-triggered self-healing switching strategy provides new insights for expanding the application range of luminescent materials.
对外部刺激具有动态响应性的发光材料在先进传感器和智能材料的开发中引起了广泛关注；然而，自愈能力对于功能性软材料也非常重要。通过将动态镧系金属-配体（Ln-L）配位引入软质聚二甲基硅氧烷聚合物网络中，实现了一种具有自愈能力的酸碱蒸汽可逆触发发光开关。通过改变Eu/Tb摩尔比或激发波长，可以调节所得发光材料的发射颜色。通过直接交替暴露于酸和碱蒸汽中，实现了发光“开-关”可逆开关，实现了可逆信息加密和解密。发光材料中的动态Ln-L交联以及氢键赋予其优异的自愈能力、高韧性和拉伸性。我们相信这种酸碱蒸汽触发的自愈开关策略为扩大发光材料的应用范围提供了新的思路。
