协调球
发色团
发光
镧系元素
化学
转身(生物化学)
荧光
金属有机骨架
配体(生物化学)
胺气处理
光化学
纳米技术
结晶学
晶体结构
材料科学
物理化学
离子
光电子学
物理
有机化学
光学
生物化学
吸附
受体
作者
Junyu Ren,Zheng Niu,Yingxiang Ye,Chen‐Yen Tsai,Shixi Liu,Qingzhi Liu,Xianqiang Huang,Ayman Nafady,Shengqian Ma
标识
DOI:10.1002/anie.202107436
摘要
Guided by a second-sphere interaction strategy, we fabricated a Tb(III)-based metal-organic framework (MMCF-4) for turn-on sensing of methyl amine with ultra-low detection limit and high turn-on efficiency. MMCF-4 features lanthanide nodes shielded in a nonacoordinate geometry along with secondary coordination spheres that are densely populated with H-bond interacting sites. Nonradiative routes were inhibited by binding-induced rigidification of the ligand on the second coordination sphere, resulting in luminescence amplification. Such remote interacting mechanism involved in the turn-on sensing event was confirmed by single-crystal X-ray diffraction and molecular dynamic simulation studies. The design of both primary and secondary coordination spheres of Tb(III) enabled the first turn-on sensing of organic amines in aqueous conditions. Our work suggests a promising strategy for high-performance turn-on sensing for Ln-MOFs and luminous materials driven by other metal chromophores.
科研通智能强力驱动
Strongly Powered by AbleSci AI