光触发的自穿插 Zn(II)-有机框架中的超分子互变：动态光开关 CO 吸附及硝基芳烃的检测。
Light-triggered Supramolecular Isomerism in a Self-catenated Zn(II)-organic Framework: Dynamic Photo-switching CO Uptake and Detection of Nitroaromatics.
机构信息
Key Laboratory of Inorganic-Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Tianjin Normal University, Tianjin 300387, People's Republic of China.
Department of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China.
出版信息
Sci Rep. 2016 Oct 11;6:34870. doi: 10.1038/srep34870.
A self-catenated Zn(II)-organic framework formulated as [Zn(3,3'-bpeab)(oba)]·DMF (1) exhibiting a six-connected 4·6·8 topology has been successfully synthesized through the mixed-ligand of kinked 3,3'-bis[2-(4-pyridyl)ethenyl]azobenzene (3,3'-bpeab) and 4,4'-oxybis-benzoic acid (Hoba) under solvothermal condition. UV light triggers isomerization of complex 1 in a single-crystal-to-single-crystal (SCSC) manner, giving rise to a conformational supramolecular isomer 1_UV through the pedal motion of photoresponsive double bonds. Dynamic photo-switching in the obtained light-responsive supramolecular isomers leads to instantly reversible CO uptake. Furthermore, the ligand originated fluorescence emission of water-resistant complex 1 is selectively sensitive to 4-nitrotoluene (4-NT) owing to a higher quenching efficiency of the perilous explosive over other structurally similar nitroaromatics, prefiguring the potentials of 1 as a fluorescence sensor towards 4-NT in aquatic media.
一种自连接的 Zn(II)-有机骨架，化学式为[Zn(3,3'-bpeab)(oba)]·DMF（1），通过扭曲的 3,3'-双[2-(4-吡啶基)乙烯基]偶氮苯（3,3'-bpeab）和 4,4'-氧双苯甲酸（Hoba）的混合配体，在溶剂热条件下成功合成。紫外光以单晶到单晶（SCSC）的方式触发配合物 1 的异构化，通过光响应双键的踏板运动，产生构象超分子异构体 1_UV。所得光响应超分子异构体中的动态光开关导致 CO 的快速可逆吸收。此外，由于危险爆炸物对其他结构相似的硝基芳烃具有更高的淬灭效率，因此耐水配合物 1 的配体起源荧光发射对 4-硝基甲苯（4-NT）具有选择性敏感性，预示着 1 作为水中 4-NT 的荧光传感器的潜力。
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