Strategies towards the control of one‐dimensional polypyrrole nanomorphology and conductivity

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F18%3A00494252" target="_blank" >RIV/61389013:_____/18:00494252 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/pi.5654" target="_blank" >http://dx.doi.org/10.1002/pi.5654</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/pi.5654" target="_blank" >10.1002/pi.5654</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Strategies towards the control of one‐dimensional polypyrrole nanomorphology and conductivity

Popis výsledku v původním jazyce

Conducting polypyrrole nanotubes rank among the most conducting polymer materials and find applications in organic electronics and energy conversion devices. They are produced by the chemical oxidation of pyrrole in globular form, which converts to nanotubes or nanofibres in the presence of suitable templates and is often accompanied by a pronounced conductivity increase. This is illustrated by the anionic dye, methyl orange, where the template formation is based on azo-hydrazone tautomerism associated with hydrogen atom transfer caused by the acidity change. In other words, the soluble salt of the dye converts to an insoluble acid, and its one‐dimensional aggregates serve as a locus for the adsorption of pyrrole oligomers. This is followed by the growth of polypyrrole chains constituting the nanotube wall. Safranin, a cationic dye, produces a template by a completely different mechanism, the oxidative generation of insoluble safranin oligomers that perform with similar results. Other mechanisms of template formation are also proposed and discussed but mainly organic dyes have a significant potential to support the one‐dimensional growth of polypyrrole. The role of surfactants that affect the morphology of templates, and subsequently also of polypyrrole, is demonstrated.

Název v anglickém jazyce

Strategies towards the control of one‐dimensional polypyrrole nanomorphology and conductivity

Popis výsledku anglicky

Conducting polypyrrole nanotubes rank among the most conducting polymer materials and find applications in organic electronics and energy conversion devices. They are produced by the chemical oxidation of pyrrole in globular form, which converts to nanotubes or nanofibres in the presence of suitable templates and is often accompanied by a pronounced conductivity increase. This is illustrated by the anionic dye, methyl orange, where the template formation is based on azo-hydrazone tautomerism associated with hydrogen atom transfer caused by the acidity change. In other words, the soluble salt of the dye converts to an insoluble acid, and its one‐dimensional aggregates serve as a locus for the adsorption of pyrrole oligomers. This is followed by the growth of polypyrrole chains constituting the nanotube wall. Safranin, a cationic dye, produces a template by a completely different mechanism, the oxidative generation of insoluble safranin oligomers that perform with similar results. Other mechanisms of template formation are also proposed and discussed but mainly organic dyes have a significant potential to support the one‐dimensional growth of polypyrrole. The role of surfactants that affect the morphology of templates, and subsequently also of polypyrrole, is demonstrated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA16-02787S" target="_blank" >GA16-02787S: Vodivé polymerní kryogely</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Polymer International

ISSN

0959-8103

e-ISSN

—

Svazek periodika

67

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

1461-1469

Kód UT WoS článku

000446565400001

EID výsledku v databázi Scopus

2-s2.0-85050451251