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Polymers 2018, 10(8), 917; https://doi.org/10.3390/polym10080917

New Polyhedral Oligomeric Silsesquioxanes-Based Fluorescent Ionic Liquids: Synthesis, Self-Assembly and Application in Sensors for Detecting Nitroaromatic Explosives

1
Key Laboratory of Special Functional Aggregated Materials Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China
2
National Engineering Technology Research Centre for Colloidal Materials, Shandong University, Jinan 250100, China
*
Authors to whom correspondence should be addressed.
Received: 8 July 2018 / Revised: 31 July 2018 / Accepted: 8 August 2018 / Published: 15 August 2018
(This article belongs to the Special Issue POSS-Based Polymers)
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Abstract

In this paper, two different models of hybrid ionic liquids (ILs) based on polyhedral oligomeric silsesquioxanes (POSSs) have been prepared. Additionally, these ILs based on POSSs (ILs-POSSs) exhibited excellent thermal stabilities and low glass transition temperatures. 1H, 13C, and 29Si nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) were used to confirm the structures of the IL-POSSs. Furthermore, the spherical vesicle structures of two IL-POSSs were observed and were caused by self-assembly behaviors. In addition, we found it very meaningful that these two ILs showed lower detection limits of 2.57 × 10−6 and 3.98 × 10−6 mol/L for detecting picric acid (PA). Moreover, the experimental data revealed that the products have high sensitivity for detecting a series of nitroaromatic compounds—including 4-nitrophenol, 2,4-dinitrophenol, and PA—and relatively comprehensive explosive detection in all of the tests of IL-POSSs with nitroaromatic compounds thus far. Additionally, the data indicate that these two new ILs have great potential for the detection of explosives. Therefore, our work may provide new materials including ILs as fluorescent sensors in detecting nitroaromatic explosives. View Full-Text
Keywords: fluorescent sensors; nitroaromatic explosives; polyhedral oligomeric silsesquioxane-based ionic liquids; self-assembly behaviors; thiol-ene ‘click’ reaction fluorescent sensors; nitroaromatic explosives; polyhedral oligomeric silsesquioxane-based ionic liquids; self-assembly behaviors; thiol-ene ‘click’ reaction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Li, W.; Wang, D.; Han, D.; Sun, R.; Zhang, J.; Feng, S. New Polyhedral Oligomeric Silsesquioxanes-Based Fluorescent Ionic Liquids: Synthesis, Self-Assembly and Application in Sensors for Detecting Nitroaromatic Explosives. Polymers 2018, 10, 917.

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