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Issue 13, 2017, Issue in Progress
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Effect of alkoxy-spacer length and solvent on diluted solutions of cationic isothiouronium polythiophenes

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Abstract

This contribution presents a study on two cationic isothiouronium polythiophenes (poly-3-(N,N-diethyl-S-iso-thiouronium)alkoxy-4-methyl thiophene), with alkoxy chains of different length in the 3-position of the thiophene ring, results of steady-state absorption and fluorescence spectroscopies in four solvents of different polarities: protic water, protic–protic water–isopropanol, protic–aprotic water–tetrahydrofuran and protic–non polar water–1,4-dioxane (all mixtures 0.5 v/v) are presented. Molar absorption coefficient (ε), quantum yield (ϕf), spectral maxima (λmax, λem) and Stokes shift (Δν) are presented, and the effect of solvents on these parameters is discussed. Empirical optical and electrochemical energy levels were estimated using drop cast films on glass and on glassy carbon electrode, respectively. Density functional theory was used to gain supporting structural, energy and electronic information of different oligomers, simulating solvents of different polarity.

Graphical abstract: Effect of alkoxy-spacer length and solvent on diluted solutions of cationic isothiouronium polythiophenes

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Publication details

The article was received on 26 Aug 2016, accepted on 26 Dec 2016 and first published on 06 Jan 2017


Article type: Paper
DOI: 10.1039/C6RA21451G
Citation: RSC Adv., 2017,7, 7648-7657
  • Open access: Creative Commons BY license
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    Effect of alkoxy-spacer length and solvent on diluted solutions of cationic isothiouronium polythiophenes

    S. E. Domínguez, M. Meriläinen, T. Ääritalo, P. Damlin and C. Kvarnström, RSC Adv., 2017, 7, 7648
    DOI: 10.1039/C6RA21451G

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