Monolayer behavior of calix-4-resorcinarenes and their surfactant complexes

Matthew Partridge, Frank Davis*, Steve W. James, Ralph P. Tatam, Charl F J Faul, Séamus P J Higson

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

1 Citation (Scopus)

Abstract

We describe within this paper a series of calix-4-resorcinarenes along with their complexes with tetraalkylammonium surfactants and their behavior in Langmuir monolayers. Calix-4-resorcinarenes were synthesized containing both undecyl and phenyl sidechains and then modified using Mannich reactions to incorporate neutral, cationic or anionic groups in the 2-positions of the resorcinol unit. In the cases of resorcinarenes modified with four sulfonate groups, mixing with long chain dialkyl dimethyl ammonium surfactants led to the formation of 1:4 complexes. These various materials were spread as Langmuir monolayers and their behavior upon compression measured. Long chain substituted resorcinarenes gave more stable monolayers than their short chain analogues. The incorporation of long chain surfactants led to large increases in surface area, demonstrating that both resorcinarenes and surfactant are located at the water surface, except for one system where a bilayer structure is potentially formed.

Original languageEnglish
Pages (from-to)6989-6993
Number of pages5
JournalThin Solid Films
Volume520
Issue number23
DOIs
Publication statusPublished - 30 Sep 2012

Keywords

  • Calixarenes
  • Isotherms
  • Monolayer
  • Tetraalkyl ammonium surfactants

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