Wu Xiao-Hui, Luo Peng, Wei Zhong, Li Yuan-Yuan, Huang Ren-Wu, Dong Xi-Yan, Li Kai, Zang Shuang-Quan, Tang Ben Zhong
College of Chemistry and Molecular Engineering Zhengzhou University Henan 450001 P. R. China.
Department of Chemistry and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction The Hong Kong University of Science & Technology Clear Water Bay Kowloon 999077 Hong Kong P. R. China.
Adv Sci (Weinh). 2018 Nov 13;6(2):1801304. doi: 10.1002/advs.201801304. eCollection 2019 Jan 23.
Utilizing aggregation-induced emission luminogens (AIEgens) as ligands has proven to be an effective strategy for constructing metal-organic frameworks (MOFs) with intense luminescent properties. However, highly luminescent AIEgen-based MOFs with adjustable emission properties are rarely achieved because of the rigid conformation of AIEgens in the crystalline state. Here, a dual-node 3D silver chalcogenolate cluster MOF () is designed and synthesized, where the AIE ligand shows relatively flexible and rotatable conformations. The conformations of AIE ligands in are switchable by the absorption/desorption of guest molecules. As a result, exhibited not only intense but also guest molecule switched luminescent properties. More importantly, the switching rate is tunable by using different guest molecules. provides a unique visualized prototype to understand the mechanism of guest-triggered aggregation-induced emission in MOFs.
利用聚集诱导发光发光体（AIEgens）作为配体已被证明是构建具有强发光特性的金属有机框架（MOFs）的有效策略。然而，由于AIEgens在晶体状态下的刚性构象，很少能实现具有可调发射特性的高发光AIEgen基MOFs。在此，设计并合成了一种双节点三维硫属银簇MOF（），其中AIE配体表现出相对灵活且可旋转的构象。中的AIE配体构象可通过客体分子的吸附/解吸来切换。结果，不仅表现出强发光，还具有客体分子切换发光特性。更重要的是，通过使用不同的客体分子可以调节切换速率。为理解MOFs中客体触发的聚集诱导发光机制提供了一个独特的可视化原型。
