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A multi-responsive luminescent indicator based on a Zn(II) metal-organic framework with “Turn on” sensing of pyridine and “Turn off” sensing of Fe3+, Cr2O72− and antibiotics in aqueous media

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Abstract One water stable three-dimensional coordination polymer {[Zn(TTPA)]·1.5DMA}n (Zn-1) was successfully synthesized via solvo-thermal reaction of a bifunctional ligand 2,5-bis-(1,2,4-triazol-1-yl)-terephthalic acid (H2TTPA) and Zn(NO3)2. Single-crystal X-ray diffraction analyses proclaimed that… Click to show full abstract

Abstract One water stable three-dimensional coordination polymer {[Zn(TTPA)]·1.5DMA}n (Zn-1) was successfully synthesized via solvo-thermal reaction of a bifunctional ligand 2,5-bis-(1,2,4-triazol-1-yl)-terephthalic acid (H2TTPA) and Zn(NO3)2. Single-crystal X-ray diffraction analyses proclaimed that Zn-1 is a 3D framework with one-dimensional channels long c direction. Further topological studies revealed that polymer Zn-1 characterized as a (4,4)-connected binodal net with Schlafli symbol as {42.84}. In addition, the luminescent researches indicate that complex Zn-1 exhibits not only excellent recognition abilities of Fe3+, Cr2O72− and antibiotics (NFT, NFZ and DTZ) via luminescence quenching mechanism, but also efficient “turn-on” fluorescence sensing property of pyridine. Zn-1 is the first MOF material with multi-sensing performances of Fe3+, Cr2O72−, antibiotics and pyridine in aqueous media.

Keywords: turn; turn sensing; aqueous media; fe3 cr2o72; cr2o72 antibiotics; framework

Journal Title: Inorganica Chimica Acta
Year Published: 2021

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