Turing pattern formation by the CIMA reaction in a chemical system consisting of quaternary alkyl ammonium cationic groups

Kouichi Asakura, Ryo Konishi, Tomomi Nakatani, Takaya Nakano, Masazumi Kamata

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

For the spontaneous generation of a Turing pattern, two intermediate species, an activator and an inhibitor, should be generated with the diffusion coefficient of the activator smaller than that of the inhibitor. The chlorite-iodide-malonic acid (CIMA) reaction that generates the activator, I-, and inhibitor, ClO2-, was performed in an open gel reactor. In order to lower the effective diffusivity of I-, micelles of quaternary alkyl ammonium cationic amphiphiles and polymers having a quaternary alkyl ammonium cationic side chain were combined in the CIMA reaction system in an open gel reactor. A Turing pattern formation was observed with the addition of n-dodecyltrimethylammonium bromide. Employing the gel reactor prepared by the polymerization of a monomer having quaternary alkyl ammonium cationic side chains also leads to the generation of a Turing pattern. The micelles and polymers are believed to trap I- in their vicinity as a counterion to lower the effective diffusivity.

Original languageEnglish
Pages (from-to)3959-3963
Number of pages5
JournalJournal of Physical Chemistry B
Volume115
Issue number14
DOIs
Publication statusPublished - 2011 Apr 14

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Iodides
Ammonium Compounds
inhibitors
iodides
Gels
reactors
Micelles
gels
acids
diffusivity
Acids
micelles
Polymers
Amphiphiles
polymers
bromides
polymerization
diffusion coefficient
monomers
Monomers

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

Turing pattern formation by the CIMA reaction in a chemical system consisting of quaternary alkyl ammonium cationic groups. / Asakura, Kouichi; Konishi, Ryo; Nakatani, Tomomi; Nakano, Takaya; Kamata, Masazumi.

In: Journal of Physical Chemistry B, Vol. 115, No. 14, 14.04.2011, p. 3959-3963.

Research output: Contribution to journalArticle

Asakura, Kouichi ; Konishi, Ryo ; Nakatani, Tomomi ; Nakano, Takaya ; Kamata, Masazumi. / Turing pattern formation by the CIMA reaction in a chemical system consisting of quaternary alkyl ammonium cationic groups. In: Journal of Physical Chemistry B. 2011 ; Vol. 115, No. 14. pp. 3959-3963.
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