A Flexible Fluorescent SCC-MOF for Switchable Molecule Identification and Temperature Display

作者：Xi‐Yan Dong, Hui‐Lin Huang, Jiayin Wang, Hai‐Yang Li, Shuang‐Quan Zang · 发表于：Chemistry of Materials · 年份：2018 · DOI：10.1021/acs.chemmater.8b00611 · 被引用次数：175 · 研究领域：Metal-Organic Frameworks: Synthesis and Applications、Nanocluster Synthesis and Applications、Magnetism in coordination complexes

Flexible luminescent metal–organic frameworks (MOFs) sensitive to physical and chemical variation demonstrate potential application in sensing, but are commonly limited to ones incorporating specialized chromophores, so that the design, preparation, and reversible well-defined crystallographic transitions of such materials remain a great challenge. Here, an easily prepared flexible luminescent silver-chalcogenolate cluster-based metal–organic framework (SCC-MOF), Ag 10 bpy, exceptionally distinguishes chloromethanes CH 2 Cl 2, CHCl 3, and CCl 4 by different fluorescent responsive signals, which originated from its crystalline dipole moment orientation relative to chromophores. Moreover, “glass-to-fluid” transition of the distinctly responsive species in the crystalline pore is demonstrated to modulate striking chromism with scarce segmented emission among MOFs, resulting from subtle dynamic solvation of chromophores. Retention of single crystallinity enables elucidation of the relationship between distinct fluorescent response and complicated structural variation at the molecular level. This new type of flexible emissive SCC-MOF is potentially useful for the development of versatile sensing and switching fluorescent materials.