一种基于金属的受体，用于选择性配位和氯化物荧光传感。

Department of Pure and Applied Sciences, University of Urbino "Carlo Bo", Via della Stazione 4, 61029 Urbino, Italy.

Institute of Molecular Sciences, University of Valencia, C/Catedrático José Beltrán 2, 46980 Paterna Valencia, Spain.

Molecules. 2021 Apr 18;26(8):2352. doi: 10.3390/molecules26082352.

A scorpionate Zn complex, constituted by a macrocyclic pyridinophane core attached to a pendant arm containing a fluorescent pyridyl-oxadiazole-phenyl unit (PyPD), has been shown to selectively recognize chloride anions, giving rise to changes in fluorescence emission that are clearly visible under a 365 nm UV lamp. This recognition event has been studied by means of absorption, fluorescence, and NMR spectroscopy, and it involves the intramolecular displacement of the PyPD unit by chloride anions. Moreover, since the chromophore is not removed from the system after the recognition event, the fluorescence can readily be restored by elimination of the bound chloride anion.

一种冠醚型 Zn 配合物，由连接在带有荧光吡啶基-噁二唑-苯基单元（PyPD）的悬垂臂上的大环吡啶烷核组成，已被证明能够选择性识别氯离子，导致荧光发射发生变化，在 365nm 紫外灯下清晰可见。通过吸收、荧光和 NMR 光谱研究了这种识别事件，它涉及氯离子对内源性 PyPD 单元的分子内取代。此外，由于在识别事件后，生色团不会从体系中除去，因此通过消除结合的氯离子，荧光可以很容易地恢复。