Optical measurements of an acylated azacrown at the air‐water interface

D. Ducharme, C. Salesse, Roger Leblanc, P. Meller, C. Mertesdorf, H. Ringsdorf

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this study, a cyclame derivative bearing four aliphatic chain substituents shows, like many amphiphiles, solid‐condensed as well as liquid‐expanded phases. In contrast to the classical amphiphiles, the onset of its phase transition is characterized by a bump‐like shape whose amplitude is a function of the compression speed. Ellipsometry which is very sensitive to the monolayer physical state changes, and fluorescence microscopy which has contributed significantly to the understanding of the phenomena occurring in the phase transition region have been used to investigate the monolayer behavior of this compound. This study shows that in the liquid‐expanded state, the film is homogeneous and remains as such until either the maximum amplitude of the bump is reached or the beginning of the plateau sets in. Thereafter, heterogeneity with formation of diamond‐like domains appears with domain sizes varying with compression speed. The formation of the domains coincides with a change in the ellipsometric zone differences. From this ellipsometric behavior, a change in the distribution of the orientation of the molecules is suggested to take place at the onset of the phase transition.

Original languageEnglish (US)
Pages (from-to)97-101
Number of pages5
JournalMacromolecular Symposia
Volume46
Issue number1
DOIs
StatePublished - 1991
Externally publishedYes

Fingerprint

optical measurement
Amphiphiles
Phase transitions
Monolayers
Bearings (structural)
Fluorescence microscopy
Ellipsometry
ellipsometry
plateaus
microscopy
Derivatives
fluorescence
Molecules
molecules

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Optical measurements of an acylated azacrown at the air‐water interface. / Ducharme, D.; Salesse, C.; Leblanc, Roger; Meller, P.; Mertesdorf, C.; Ringsdorf, H.

In: Macromolecular Symposia, Vol. 46, No. 1, 1991, p. 97-101.

Research output: Contribution to journalArticle

Ducharme, D, Salesse, C, Leblanc, R, Meller, P, Mertesdorf, C & Ringsdorf, H 1991, 'Optical measurements of an acylated azacrown at the air‐water interface', Macromolecular Symposia, vol. 46, no. 1, pp. 97-101. https://doi.org/10.1002/masy.19910460113
Ducharme, D. ; Salesse, C. ; Leblanc, Roger ; Meller, P. ; Mertesdorf, C. ; Ringsdorf, H. / Optical measurements of an acylated azacrown at the air‐water interface. In: Macromolecular Symposia. 1991 ; Vol. 46, No. 1. pp. 97-101.
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