Dallas, Panagiotis, Rašović, Ilija and Porfyrakis, Kyriakos ORCID: 0000-0003-1364-0261 (2016) Mapping and tuning the fluorescence of perfluorinated polyanilines synthesized through liquid–liquid interfaces. The Journal of Physical Chemistry B, 120 (13). pp. 3441-3454. ISSN 1520-6106 (Print), 1520-5207 (Online) (doi:https://doi.org/10.1021/acs.jpcb.6b00739)

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Abstract

A series of light-emitting perfluorinated polyanilines were synthesized by the oxidative polymerization of 3-perfluorooctyl aniline through a variety of aqueous/organic interfaces. According to the interfacial tension between the two solvents (the organic being chloroform, dichloromethane, perfluorinated ether, toluene, or o-dichlorobenzene), we obtain distinctive classes of materials based on the crystal packing, protonation, and oxidation state of the polymeric chains. We distinguish between soluble fractions with a distinctive, strong, and red-shifted photoluminescence pattern and an insoluble precipitate which can be subsequently solubilized in a mixture of acetone and toluene. The emission maximum for the insoluble fraction is located in the ultraviolet or blue region with a small Stokes shift; maxima for the soluble counterparts are in the green to yellow region. The soluble derivatives demonstrate a significantly smaller band gap compared to the monomer and large Stokes shifts up to 163 nm; the emission maximum for the most red-shifted emission was located at λem = 548 nm. Their redox activity toward silver nanoparticles, their sensor reactivity with organic acid and bases, and the subsequent changes in the optical properties were demonstrated and the structure of the materials was evaluated with NMR, X-ray diffraction, and FTIR/Raman spectroscopy.

Item Type:	Article
Uncontrolled Keywords:	fluorescence, perfluorinated polyanilines, liquid-liquid interface
Subjects:	Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	19 Sep 2020 00:20
URI:	http://gala.gre.ac.uk/id/eprint/25777

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