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Issue 8, 2019
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Bifunctional photo- and vapochromic behaviors of a novel porous zwitterionic metal–organic framework

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Abstract

A novel zwitterionic metal–organic framework [Zn(Cbdcp)(4,4′-bipy)0.5]·2H2O (Zn-MOF) with large holes was synthesized by utilizing a flexible zwitterionic ligand H3CbdcpCl (Cbdcp = N-(4-carboxybenzyl)-(3,5-dicarboxyl)pyridinium) and auxiliary ligand 4,4′-bipy. The framework exhibited photochromic property, and we simulated the competition mechanism between pyridine and 4,4′-bipy through theoretical calculations. The results showed that 4,4′-bipy exhibited stronger electron-accepting ability than pyridine, and O atoms from the benzene carboxylic groups were mainly electron donors. More attractively, the compound also showed significant color change from colorless to yellow when exposed to NH3, ethylamine (EA), and n-propylamine (PA) vapor within just a few seconds. This work provides abundant scope to explore novel MOF materials as colorimetric sensors and a new route to design practical MOFs.

Graphical abstract: Bifunctional photo- and vapochromic behaviors of a novel porous zwitterionic metal–organic framework

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Publication details

The article was received on 27 Sep 2018, accepted on 22 Jan 2019 and first published on 23 Jan 2019


Article type: Paper
DOI: 10.1039/C8NJ04905J
Citation: New J. Chem., 2019,43, 3428-3431

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    Bifunctional photo- and vapochromic behaviors of a novel porous zwitterionic metal–organic framework

    L. Li, Y. Hua, Y. Guo, H. Wang, X. Li and H. Zhang, New J. Chem., 2019, 43, 3428
    DOI: 10.1039/C8NJ04905J

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