Synthesis, Structure, and Chemical Properties of Lithium Salts of Poly(2-methoxyaniline-5-sulfonic acid)

Abstract

Treatment of poly(2-methoxyaniline-5-sulfonic acid) (PAS) with LiOH gave its lithium salts, PAS(Li)s, with various degrees of lithium sulfonation. Structure of a fully lithium-sulfonated PAS(Li) was determined by 1 H NMR spectroscopy and elemental analysis. Cyclic voltammetry and complex impedance analysis revealed electrochemical properties of the PAS(Li) films depending on the degree of the lithium sulfonation. PAS(Li)s had ionic conductivity of about 1 × 10 -6 S cm -1 at 302 K. The packing structure of PAS(Li) is discussed on the basis of powder XRD data.

Fine tuning between organic and inorganic host structure: new trends in layered double hydroxide hybrid assemblies

“…An alternative to forming conductive polymer-LDH phases may be the intercalation of water-soluble conducting polymers possessing a high rate of functionalization such as poly[anilineco-N-(4-sulfophenyl)aniline] (PAPSA) and other self-doping polyanilines. [71][72][73]…”

Synthesis and optical, electrical, and thermoelectric properties of sodium salts of polyaniline sulfonic acid

“…These observations suggest that sodium sulfonation significantly affected the aryl-S linkages. p-p ⁄ transitions, respectively [15,21]. The peak at approximately 478 nm decreased and that at approximately 330 nm increased with the increase in the degree of sodium sulfonation.…”

“…These observations are comparable to the case in which LiOHaq was added to a Scheme 1. Synthesis of PAS(Na)s. solution of PAS [21]. The decrease in the peak at 478 nm was associated with the decrease in the degree of self-doping or the decrease in the positively charged main chain led by the sulfo group.…”

“…Thus, the substitution of other ions such as those of alkaline metals for the sulfonic acid proton in SPAN can control the self-doping level in SPANs. It was reported that the degree of lithium sulfonation in SPANs depended on the feed ratio of LiOH to SPANs in reactions of SPANs with LiOH [21]. Elucidation of relationship between the thermoelectric properties and the level of doping in alkaline metal salts of SPANs will provide fundamental information for the development of new OPC thermoelectric materials.…”

Redox‐Active Catalyst Based on Poly(Anilinesulfonic Acid)‐ Supported Gold Nanoparticles for Aerobic Alcohol Oxidation in Water

“…In the catalytic reaction under an argon atmosphere (Table 1, entry 4), a significant spectral change was observed after the reaction (Figure 3, a), whereas the yield was poor. The characteristic polaron band (747 nm) [7] disappeared after the reaction, in the meantime a sharp peak appeared at 402 nm, which is assigned to the reduced form of PMAS [8] ( Figure 3, a). The surface plasmon band of Au NPs was observed after the reaction.…”