title: A Temperature-Responsive Smart Europium Metal-Organic Framework Switch for Reversible Capture and Release of Intrinsic Eu3+Ions.
abstract: Stimuli-responsive structural transformations are emerging as a scaffold to develop a charming class of smart materials. AEuLmetal-organic framework (MOF) undergoes a reversible temperature-stimulated single-crystal to single-crystal transformation, showing a specific behavior of fast capture/release of free Eu3+in the channels at low and room temperatures. At room temperature, compound1ais obtained with one free carboxylate group severing as further hook, featuring one-dimensional square channels filled with intrinsic free europium ions. Trigged by lowering the ambient temperature,1bis gained. In1b, the intrinsic free europium ions can be fast captured by the carboxylate-hooks anchored in the framework, resulting in the structural change and its channel distortion. To the best of our knowledge, this is the first report of such a rapid and reversible switch stemming from dynamic control between noncovalent and covalent Eu-ligand interactions. UtilizingEuLMOF to detect highly explosive 2,4,6-trinitrophenol at room temperature and low temperature provides a glimpse into the potential of this material in fluorescence sensors.
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China; University of Chinese Academy of Sciences Beijing 100049 P. R. China.
authors.forename: Min
authors.initials: M
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China; University of Chinese Academy of Sciences Beijing 100049 P. R. China.
authors.forename: Xue-Zhi
authors.initials: XZ
authors.lastname: Song
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China.
authors.forename: Shu-Yan
authors.initials: SY
authors.lastname: Song
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China; University of Chinese Academy of Sciences Beijing 100049 P. R. China.
authors.forename: Shu-Na
authors.initials: SN
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China; University of Chinese Academy of Sciences Beijing 100049 P. R. China.
authors.forename: Xing
authors.initials: X
authors.lastname: Meng
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China; University of Chinese Academy of Sciences Beijing 100049 P. R. China.
authors.forename: Lan-Lan
authors.initials: LL
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China; University of Chinese Academy of Sciences Beijing 100049 P. R. China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences 5625 Renmin Street Changchun 130022 P. R. China.
authors.forename: Hong-Jie
authors.initials: HJ
authors.lastname: Zhang
keywords: dynamic bonds; explosive detection; host‐guest system; phase transitions; smart frameworks