A fluorescent zinc(II)-based layered complex for selective sensing of Cr 2 O 7 2– and Fe 3+ ions in water system

Content Provider	Semantic Scholar
Author	Zhang, De-Yu He, Hongming Zhang, Yu Wang, Xiu-Guang Zhao, Xiao-Jun Yang, En-Cui
Copyright Year	2019
Abstract	A new Zn(II)-organic framework with 2,2-bipyridine-5,5-dicarboxylate (bpydc) ligand {[Zn(H2O)(bpydc)]ꞏCH3OH}n has been obtained solvothermally, followed by structural and photophysical characterization. Structural analysis reveals that the distorted Zn2+ octahedra are periodically extended by the ditopic bpydc2‒ connector, leading to a coplanar grid-like (4 4) layer. The complex exhibits excellent thermal and environmental stability as well as good dispersion in water system. More interestingly, resulting from the efficient ligand to metal charge transfer, the complex has been observed to emit strong blue emission dispersed in water medium enabling the detection of both Cr2O7 and Fe3+ ions through fluorescence quenching with large quenching constants (1.12105 M1 and 2.12104 M1) and low limits of detection (0.54 M and 1.02 M). These interesting results suggest that the complex can potentially serve as a promising dual-responsive luminescent sensor material for environmental pollutant monitoring.
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Language	English
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Content Type	Text
Resource Type	Article