Electrical conductivity transitions and self-assembly in comb-shaped complexes of polyaniline based on crystallization and melting of the supramolecular side chains

Marja Vilkman, Harri Kosonen (Corresponding Author), Antti Nykänen, Janne Ruokolainen, Mika Torkkeli, Ritva Serimaa, Olli Ikkala (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

We report self-assembly and electronic conductivity transitions in polyaniline (PANI) where the iminic nitrogens are protonated by sulfonic acid-terminated low molecular weight poly(ethylene oxide) CH3−(O−C2H4−)46−CH2−SO3H (PEOSA), i.e., which contains 46 ethylene oxide repeat units. The complex PANI(PEOSA)0.5 self-assembles due to the comb-shaped architecture consisting of the PANI backbone and the supramolecular PEO side chains, as characterized using small- and wide-angle X-ray scattering (SAXS and WAXS) and transmission electron microscopy (TEM). PEO in the complex PANI(PEOSA)0.5 is crystalline near room temperature; TEM and SAXS indicate lamellar self-assembly with a long period of ca. 150 Å, and the conductivity is of the order 10-4 S/cm. A collapse of the self-assembly periodicity to 115 Å is observed at ca. 55 °C during a slow heating at 1 °C/min, and the conductivity drops stepwise to ca. half of the value as the PEO chains melt. Even if the observed conductivity transition is still relatively small, it is reproducible and reversible upon heating and cooling, with some hysteresis. We expect that the concept can be developed to open new possibilities for responsive conjugated polymers.
Original languageEnglish
Pages (from-to)7793 - 7797
Number of pages5
JournalMacromolecules
Volume38
Issue number18
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

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Polyaniline
Crystallization
Polyethylene oxides
Self assembly
Melting
Transmission electron microscopy
Heating
Ethylene Oxide
Sulfonic Acids
Conjugated polymers
X ray scattering
Hysteresis
Ethylene
Nitrogen
Molecular weight
Crystalline materials
Cooling
Oxides
Acids
Electric Conductivity

Cite this

Vilkman, Marja ; Kosonen, Harri ; Nykänen, Antti ; Ruokolainen, Janne ; Torkkeli, Mika ; Serimaa, Ritva ; Ikkala, Olli. / Electrical conductivity transitions and self-assembly in comb-shaped complexes of polyaniline based on crystallization and melting of the supramolecular side chains. In: Macromolecules. 2005 ; Vol. 38, No. 18. pp. 7793 - 7797.
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title = "Electrical conductivity transitions and self-assembly in comb-shaped complexes of polyaniline based on crystallization and melting of the supramolecular side chains",
abstract = "We report self-assembly and electronic conductivity transitions in polyaniline (PANI) where the iminic nitrogens are protonated by sulfonic acid-terminated low molecular weight poly(ethylene oxide) CH3−(O−C2H4−)46−CH2−SO3H (PEOSA), i.e., which contains 46 ethylene oxide repeat units. The complex PANI(PEOSA)0.5 self-assembles due to the comb-shaped architecture consisting of the PANI backbone and the supramolecular PEO side chains, as characterized using small- and wide-angle X-ray scattering (SAXS and WAXS) and transmission electron microscopy (TEM). PEO in the complex PANI(PEOSA)0.5 is crystalline near room temperature; TEM and SAXS indicate lamellar self-assembly with a long period of ca. 150 {\AA}, and the conductivity is of the order 10-4 S/cm. A collapse of the self-assembly periodicity to 115 {\AA} is observed at ca. 55 °C during a slow heating at 1 °C/min, and the conductivity drops stepwise to ca. half of the value as the PEO chains melt. Even if the observed conductivity transition is still relatively small, it is reproducible and reversible upon heating and cooling, with some hysteresis. We expect that the concept can be developed to open new possibilities for responsive conjugated polymers.",
author = "Marja Vilkman and Harri Kosonen and Antti Nyk{\"a}nen and Janne Ruokolainen and Mika Torkkeli and Ritva Serimaa and Olli Ikkala",
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Electrical conductivity transitions and self-assembly in comb-shaped complexes of polyaniline based on crystallization and melting of the supramolecular side chains. / Vilkman, Marja; Kosonen, Harri (Corresponding Author); Nykänen, Antti; Ruokolainen, Janne; Torkkeli, Mika; Serimaa, Ritva; Ikkala, Olli (Corresponding Author).

In: Macromolecules, Vol. 38, No. 18, 2005, p. 7793 - 7797.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Electrical conductivity transitions and self-assembly in comb-shaped complexes of polyaniline based on crystallization and melting of the supramolecular side chains

AU - Vilkman, Marja

AU - Kosonen, Harri

AU - Nykänen, Antti

AU - Ruokolainen, Janne

AU - Torkkeli, Mika

AU - Serimaa, Ritva

AU - Ikkala, Olli

N1 - Project code: T4SU00236

PY - 2005

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N2 - We report self-assembly and electronic conductivity transitions in polyaniline (PANI) where the iminic nitrogens are protonated by sulfonic acid-terminated low molecular weight poly(ethylene oxide) CH3−(O−C2H4−)46−CH2−SO3H (PEOSA), i.e., which contains 46 ethylene oxide repeat units. The complex PANI(PEOSA)0.5 self-assembles due to the comb-shaped architecture consisting of the PANI backbone and the supramolecular PEO side chains, as characterized using small- and wide-angle X-ray scattering (SAXS and WAXS) and transmission electron microscopy (TEM). PEO in the complex PANI(PEOSA)0.5 is crystalline near room temperature; TEM and SAXS indicate lamellar self-assembly with a long period of ca. 150 Å, and the conductivity is of the order 10-4 S/cm. A collapse of the self-assembly periodicity to 115 Å is observed at ca. 55 °C during a slow heating at 1 °C/min, and the conductivity drops stepwise to ca. half of the value as the PEO chains melt. Even if the observed conductivity transition is still relatively small, it is reproducible and reversible upon heating and cooling, with some hysteresis. We expect that the concept can be developed to open new possibilities for responsive conjugated polymers.

AB - We report self-assembly and electronic conductivity transitions in polyaniline (PANI) where the iminic nitrogens are protonated by sulfonic acid-terminated low molecular weight poly(ethylene oxide) CH3−(O−C2H4−)46−CH2−SO3H (PEOSA), i.e., which contains 46 ethylene oxide repeat units. The complex PANI(PEOSA)0.5 self-assembles due to the comb-shaped architecture consisting of the PANI backbone and the supramolecular PEO side chains, as characterized using small- and wide-angle X-ray scattering (SAXS and WAXS) and transmission electron microscopy (TEM). PEO in the complex PANI(PEOSA)0.5 is crystalline near room temperature; TEM and SAXS indicate lamellar self-assembly with a long period of ca. 150 Å, and the conductivity is of the order 10-4 S/cm. A collapse of the self-assembly periodicity to 115 Å is observed at ca. 55 °C during a slow heating at 1 °C/min, and the conductivity drops stepwise to ca. half of the value as the PEO chains melt. Even if the observed conductivity transition is still relatively small, it is reproducible and reversible upon heating and cooling, with some hysteresis. We expect that the concept can be developed to open new possibilities for responsive conjugated polymers.

U2 - 10.1021/ma0502856

DO - 10.1021/ma0502856

M3 - Article

VL - 38

SP - 7793

EP - 7797

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 18

ER -