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Preparation of two new polyimide bond linked porous covalent organic frameworks and their fluorescence sensing application for sensitive and selective determination of Fe3+.
- Source :
- New Journal of Chemistry; 12/7/2017, Vol. 41 Issue 23, p14272-14278, 7p
- Publication Year :
- 2017
-
Abstract
- 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<subscript>2</subscript> atmosphere, respectively. Their structures and properties were characterized using elemental analysis, Fourier transform infrared spectra, X-ray photoelectron spectroscopy, X-ray powder diffraction, N<subscript>2</subscript> 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 π* → n transition caused by the high electro-delocalization and inherently rigid structure of the COF materials. The strong quenching effects of Fe<superscript>3+</superscript> on the fluorescence of the COFs allowed selective chemosensing for Fe<superscript>3+</superscript>. [ABSTRACT FROM AUTHOR]
- Subjects :
- METAL-organic frameworks
FLUORESCENCE
CHEMICAL bonds
Subjects
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 41
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 126326081
- Full Text :
- https://doi.org/10.1039/c7nj02134h