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Preparation of two new polyimide bond linked porous covalent organic frameworks and their fluorescent sensing application for sensitive and selective determination of Fe3+

Abstract

Two new polyimide based porous covalent organic frameworks(PI-COF 201 and PI-COF 202) were synthesized in high yields by directly heating the mixtures of melamine and pyromellitic dianhydride and naphthalenetetracarboxylic dianhydride in N2 atmosphere, respectively. Their structures and properties were characterized by elemental analysis, Fourier transform infrared spectra, X-ray photoelectron spectroscopy, X- ray powder diffraction, N2 adsorption-desorption and scanning electron microscopy and the fluorescence properties were studied in detail. These two COFs emitted strong fluorescence in proper solvents originated from π*→n transition caused by high electro-delocalization and inherent rigid structure of the COF materials. Strong quenching effects of Fe3+ on the fluorescene of the COFs allowed selective chemosensing for Fe3+.

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Publication details

The article was received on 14 Jun 2017, accepted on 02 Oct 2017 and first published on 02 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02134H
Citation: New J. Chem., 2017, Accepted Manuscript
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    Preparation of two new polyimide bond linked porous covalent organic frameworks and their fluorescent sensing application for sensitive and selective determination of Fe3+

    T. Wang, R. Xue, H. Chen, P. Shi, X. Lei, Y. Wei, H. Guo and W. Yang, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02134H

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