NDLI: Emission enhanced two-component gels for the detection of organic amine vapors

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Panpan Wang, Sisi Yao, Boqi Xue, Pengchong
Copyright Year	2015
Abstract	Hydrogen bonds could help two compounds (C12Ph and SP) with weak emission to produce strong fluorescent complexes and give them the capability to form gels in organic solvents. The complexes exhibited very weak emission in the sol state but emitted strong blue fluorescence with more than a 100-fold increase in emissive intensity after the sols changed into gels. The results from UV-vis absorption, circular dichroism and FT-IR spectral observations suggest that gelation induces the formation of J-aggregates. The fluorescence spectra imply that J-aggregates are responsible for the enhanced emission during gelation. Moreover, a small amount of SP, for example 10% by mole, could help C12Ph to construct three-dimensional fibrous networks and prevent the solvent from flowing. More importantly, a two-component gel film could be used as a sensor to quantitatively detect and discriminate between aliphatic and aromatic organic amine vapors. Aromatic amine vapors might quench the fluorescence of gel film and fluorescence would recover after the quenched film was exposed to air, suggesting a reversible sensing behaviour. On the other hand, although the strong blue emission disappeared after the gel film was exposed to aliphatic amine vapour, blue fluorescence was not restored because the hydrogen-bonded complex was destroyed.
Starting Page	6874
Ending Page	6881
Page Count	8
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	39
Issue Number	9
Journal	New Journal of Chemistry
DOI	10.1039/c5nj01168j
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Aliphatic compound Fluorescence Fourier-transform infrared spectroscopy Solvent Circular dichroism Aromatic amine
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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