Polymer-metal complexes in polyelectrolyte multilayer films as catalysts for oxidation of toluene

Almagul Mentbayeva, Alyiya Ospanova, Zheneta Tashmuhambetova, Valeria Sokolova, Svetlana Sukhishvili

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

We report on the binding of metal ions (Me 2+; Co 2+ and Cu 2+) with weak polyelectrolyte multilayers (PEMs), as well as on catalytic activity of PEM-Me 2+ films for oxidation of toluene. Using several types of PEM films constructed using branched polyethyleneimine (BPEI) or quaterinized poly-4-vinylpyridines (QPVPs) as polycations and poly(acrylic acid) (PAA) or poly(styrene sulfonate) (PSS) as polyanions, we found that binding of Co 2+ and Cu 2+ ions with a PEM matrix can occur both through coordination to polycationic amino groups and/or ionic binding to polyacid groups. The amount of metal ions loaded within the film increased linearly with film thickness and was strongly dependent on polyelectrolyte type, film assembly pH, and fraction of permanent charge in polymer chains. Among various PEM-Me 2+ systems, BPEI/PAA-Co 2+ films assembled at pH 8.5 show the best catalytic performance, probably because of the preservation of high mobility of Co 2+ ions coordinated to amino groups of BPEI in these films. With BPEI/PAA-Co 2+ films, we demonstrated that films were highly permeable to reagents and reaction products within hundreds of nanometers of the film bulk; i.e., film catalytic activity increased linearly with layer number up to 30 bilayers and slowed for thicker films.

Original languageEnglish
Pages (from-to)11948-11955
Number of pages8
JournalLangmuir
Volume28
Issue number32
DOIs
Publication statusPublished - Aug 14 2012
Externally publishedYes

Fingerprint

Multilayer films
Coordination Complexes
Toluene
Metal complexes
Polyelectrolytes
toluene
Polymers
catalysts
Oxidation
oxidation
Catalysts
Polyethyleneimine
polymers
metals
Multilayers
carbopol 940
Metal ions
Catalyst activity
catalytic activity
metal ions

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Mentbayeva, A., Ospanova, A., Tashmuhambetova, Z., Sokolova, V., & Sukhishvili, S. (2012). Polymer-metal complexes in polyelectrolyte multilayer films as catalysts for oxidation of toluene. Langmuir, 28(32), 11948-11955. https://doi.org/10.1021/la3025342

Polymer-metal complexes in polyelectrolyte multilayer films as catalysts for oxidation of toluene. / Mentbayeva, Almagul; Ospanova, Alyiya; Tashmuhambetova, Zheneta; Sokolova, Valeria; Sukhishvili, Svetlana.

In: Langmuir, Vol. 28, No. 32, 14.08.2012, p. 11948-11955.

Research output: Contribution to journalArticle

Mentbayeva, A, Ospanova, A, Tashmuhambetova, Z, Sokolova, V & Sukhishvili, S 2012, 'Polymer-metal complexes in polyelectrolyte multilayer films as catalysts for oxidation of toluene', Langmuir, vol. 28, no. 32, pp. 11948-11955. https://doi.org/10.1021/la3025342
Mentbayeva A, Ospanova A, Tashmuhambetova Z, Sokolova V, Sukhishvili S. Polymer-metal complexes in polyelectrolyte multilayer films as catalysts for oxidation of toluene. Langmuir. 2012 Aug 14;28(32):11948-11955. https://doi.org/10.1021/la3025342
Mentbayeva, Almagul ; Ospanova, Alyiya ; Tashmuhambetova, Zheneta ; Sokolova, Valeria ; Sukhishvili, Svetlana. / Polymer-metal complexes in polyelectrolyte multilayer films as catalysts for oxidation of toluene. In: Langmuir. 2012 ; Vol. 28, No. 32. pp. 11948-11955.
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