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

被引：108

作者：

Wang, Ting ^{[1
]}

Xue, Rui ^{[1
]}

Chen, Huiqin ^{[1
]}

Shi, Peiling ^{[1
]}

Lei, Xi ^{[1
]}

Wei, Yuli ^{[1
]}

Guo, Hao ^{[1
]}

Yang, Wu ^{[1
]}

机构：

[1] Northwest Normal Univ, Key Lab Bioelectrochem & Environm Anal Gansu Prov, Coll Chem & Chem Engn, Lanzhou 730070, Gansu, Peoples R China

来源：

NEW JOURNAL OF CHEMISTRY | 2017年 / 41卷 / 23期

基金：

中国国家自然科学基金;

关键词：

HYDROGEN; CRYSTALLINE; POLYMERS; CONSTRUCTION; SEPARATION; PERYLENE; TRIAZINE; WATER;

D O I：

10.1039/c7nj02134h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two new polyimide based porous covalent organic frameworks (PI-COF 201 and PI-COF 202) were synthesized in high yields by directly heating mixtures of melamine and pyromellitic dianhydride and naphthalenetetracarboxylic dianhydride in a N-2 atmosphere, respectively. Their structures and properties were characterized using elemental analysis, Fourier transform infrared spectra, X-ray photoelectron spectroscopy, X-ray powder diffraction, N-2 adsorption-desorption and scanning electron microscopy and their fluorescence properties were studied in detail. These two COFs emitted strong fluorescence in appropriate solvents that originated from the pi* -> n transition caused by the high electrodelocalization and inherently rigid structure of the COF materials. The strong quenching effects of Fe3+ on the fluorescence of the COFs allowed selective chemosensing for Fe3+.

引用

页码：14272 / 14278

页数：7

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