Template-directed self-assembly by way of molecular recognition at the micellar-solvent interface: Modulation of the critical micelle concentration

Mark A. Olson*, Jonathan R. Thompson, Trenton J. Dawson, Christopher M. Hernandez, Marco S. Messina, Travis O'Neal

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

By incorporating the concepts of structural preorganisation and complementarity in concert with non-covalent donor-acceptor [π⋯π] and hydrophobic interactions, a duo of π-electron deficient bipyridinium-based linear and gemini amphiphiles capable of responding to molecular templation have been designed and synthesised. When combined with π-electron rich di(ethylene glycol)-disubstituted 1,5-dihydroxynaphthalene, a dramatic decrease in the critical aggregation concentration by ≈66% was observed with concomitant increases in the hydrodynamic diameter, ζ-potential, and Langmuir surface pressures of the micellar solutions - thus enhancing the detergents' efficiency and effectiveness at lowering the surface tension of water. By employing a phase separation model that takes into account the degree of counterion binding to the micellar aggregate superstructure, the effects of donor-acceptor templation on the Gibb's free energy of micellisation (ΔG°M) for the amphiphiles was quantified. It was found that donor-acceptor templation was capable of lowering ΔG°M by up to 1.75 kcal mol-1 at which point it was observed, while under the influence of molecular templation, that linear single hydrophobic tailed detergent molecules exhibit properties characteristic of double-tailed phospholipid-like gemini surfactants.

Original languageEnglish (US)
Pages (from-to)6483-6492
Number of pages10
JournalOrganic and Biomolecular Chemistry
Volume11
Issue number38
DOIs
StatePublished - Oct 14 2013
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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