Probing the effect of anion structure on the physical properties of cationic 1, 2, 3‐triazolium‐based poly(ionic liquid)s. Issue 14 (18th April 2016)

• Record Type: Journal Article
• Authors: Obadia, Mona M.; Fagour, Sébastien; Vygodskii, Yakov S.; Vidal, Frédéric; Serghei, Anatoli; Shaplov, Alexander S.; Drockenmuller, Eric
• Is Part Of: Journal of polymer science. Volume 54:Issue 14(2016)
• Page Start: 2191
• Page End: 2199
• Publication Date: 2016-04-18
• Subjects: click chemistry -- poly(1, 2, 3‐triazolium)s -- poly(ionic liquid)s -- step growth polymerization -- polyelectrolytes -- conducting materials; 547
• DOI: 10.1002/pola.28092
• Languages: English
• ISSNs: 0887-624X

Abstract

ABSTRACT: To extensively explore the influence of anion structure on the physical properties of poly(ionic liquid)s (PILs) a series of PILs having main‐chain 1, 2, 3‐triazolium cations was synthesized via copper(I)‐catalyzed azide‐alkyne 1, 3‐dipolar cycloaddition (CuAAC) followed by N ‐alkylation with iodomethane and anion metathesis with different metal salts, that is, Li(CF3 SO2 )2 N, Li(CF3 CF2 SO2 )2 N, K(FSO2 )2 N, K(CF3 SO2 )N(CN), Ag(CN)2 N, and sodium 4, 5‐dicyano‐1, 2, 3‐triazolate. To isolate the effect of anion on physical properties of PILs, a common iodide precursor was used to maintain constant the average degree of polymerization ( DP n ) and chain dispersity. Detailed structure/properties relationship analyses demonstrated a lack of correlation between anion chemical structure, ionic conductivity, and glass transition temperatures. Among synthesized series, the PIL derivative having bis(trifluoromethylsulfonyl)imide counter anion showed the best compromise in performance: low glass transition temperature ( T g = −68 °C), high thermal stability ( T onset = 340 °C) and superior ionic conductivity ( σ DC = 8.5 × 10 − 6 S/cm at 30 °C), which makes it an interesting candidate for various key modern electrochemical applications. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2016, 54, 2191–2199 Abstract : This study has investigated the unique correlation between the chemical structure of a series of counter anions and the physical properties of 1, 2, 3‐triazolium‐based cationic polyelectrolytes with the fixed chain length and dispersity. It was found that the rules governing the physical properties of ionic liquids are not applicable to their macromolecular analogues. Among the variety of studied anions, the (CF3 SO2 )2 N anion remains the candidate of choice for the preparation of polymers combining low Tg, high thermal stability and enhanced ionic conductivity.