Polypyrrole salts and bases: Superior conductivity of nanotubes and their stability towards the loss of conductivity by deprotonation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F16%3A43902002" target="_blank" >RIV/60461373:22340/16:43902002 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389013:_____/16:00462628 RIV/00216208:11320/16:10330000

Výsledek na webu

<a href="http://pubs.rsc.org/en/Content/ArticleLanding/2016/RA/C6RA19461C#!divAbstract" target="_blank" >http://pubs.rsc.org/en/Content/ArticleLanding/2016/RA/C6RA19461C#!divAbstract</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c6ra19461c" target="_blank" >10.1039/c6ra19461c</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polypyrrole salts and bases: Superior conductivity of nanotubes and their stability towards the loss of conductivity by deprotonation

Popis výsledku v původním jazyce

Polypyrrole nanotubes exhibit conductivity of tens S cm-1 which is one of the highest among the current conducting polymers. They are thus superior to the common globular form with the conductivity of units of S cm-1 or lower. The conductivity of both forms is reduced after treatment with alkalis but still remains high, units of S cm-1 and 10-2 S cm-1, respectively. The deprotonation, which is responsible for conductivity reduction, is discussed on the basis of salt-base transition in polypyrrole. It is not fully reversible, and the reprotonation with acids recovers the conductivity only in part. The role of methyl orange, which was used to support the formation of nanotubes, is proposed to be similar to that of surfactants. FTIR and Raman spectroscopies prove that methyl orange is strongly bound to polypyrrole in its acid form, and an "insertion" mechanism is proposed to explain the resistance towards the deprotonation of nanotubes. The spectra also illustrate that the molecular structure of nanotubular polypyrrole is preserved even under highly alkaline conditions at a pH close to 14, where the globular form becomes damaged. Polypyrrole, especially in its nanotubular form, is of promise in applications requiring electrical conduction even under neutral or alkaline conditions, where other conducting polymers, such as polyaniline, lose their exploitable conductivity.

Název v anglickém jazyce

Polypyrrole salts and bases: Superior conductivity of nanotubes and their stability towards the loss of conductivity by deprotonation

Popis výsledku anglicky

Polypyrrole nanotubes exhibit conductivity of tens S cm-1 which is one of the highest among the current conducting polymers. They are thus superior to the common globular form with the conductivity of units of S cm-1 or lower. The conductivity of both forms is reduced after treatment with alkalis but still remains high, units of S cm-1 and 10-2 S cm-1, respectively. The deprotonation, which is responsible for conductivity reduction, is discussed on the basis of salt-base transition in polypyrrole. It is not fully reversible, and the reprotonation with acids recovers the conductivity only in part. The role of methyl orange, which was used to support the formation of nanotubes, is proposed to be similar to that of surfactants. FTIR and Raman spectroscopies prove that methyl orange is strongly bound to polypyrrole in its acid form, and an "insertion" mechanism is proposed to explain the resistance towards the deprotonation of nanotubes. The spectra also illustrate that the molecular structure of nanotubular polypyrrole is preserved even under highly alkaline conditions at a pH close to 14, where the globular form becomes damaged. Polypyrrole, especially in its nanotubular form, is of promise in applications requiring electrical conduction even under neutral or alkaline conditions, where other conducting polymers, such as polyaniline, lose their exploitable conductivity.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

—

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

RSC Advances

ISSN

2046-2069

e-ISSN

—

Svazek periodika

6

Číslo periodika v rámci svazku

91

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

88382-88391

Kód UT WoS článku

000384571800066

EID výsledku v databázi Scopus

2-s2.0-84988422336