Formation of molecular membranes in water from ionene oligomers and related amphiphiles

Toyoki Kunitake, Akihiko Tsuge, Kunihide Takarabe

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Ionenes were prepared by reaction of α,ω-dibromoalkanes and α,ω-bis(dimethylamino)alkanes at room temperature. The degree of polymerization as estimated from NMR data was 2 to 5. The oligomeric ammonium amphiphiles (ionenes) thus obtained gave molecular weights of 105 to 108 in water. Vesicles of the molecular membrane were formed by self-assembly of the C20 ionene. A related bis-ammonium amphiphile gave similar results. The introduction of symmetrical aromatic rings into the middle of the C20 chain did not change the general aggregation behavior. Differential scanning calorimetry indicated the presence of gel-to-liquid crystal phase transition in these cases. No membrane formation was observed when the methylene chain length was shorter (C10 and C12) or the two methylene portions were uneven in length (C20 and C16).

Original languageEnglish
Pages (from-to)633-640
Number of pages8
JournalPolymer Journal
Volume17
Issue number4
DOIs
Publication statusPublished - Apr 1985

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Amphiphiles
Ammonium Compounds
Oligomers
Membranes
Liquid Crystals
Alkanes
Water
Chain length
Liquid crystals
Paraffins
Self assembly
Differential scanning calorimetry
Agglomeration
Gels
Phase transitions
Molecular weight
Polymerization
Nuclear magnetic resonance
Temperature

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

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Formation of molecular membranes in water from ionene oligomers and related amphiphiles. / Kunitake, Toyoki; Tsuge, Akihiko; Takarabe, Kunihide.

In: Polymer Journal, Vol. 17, No. 4, 04.1985, p. 633-640.

Research output: Contribution to journalArticle

Kunitake, Toyoki ; Tsuge, Akihiko ; Takarabe, Kunihide. / Formation of molecular membranes in water from ionene oligomers and related amphiphiles. In: Polymer Journal. 1985 ; Vol. 17, No. 4. pp. 633-640.
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