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Related Experiment Videos

Two component model of orientationally ordered wall adjacent liquid layers.

A Yu Popovskii1, Yu M Popovskii, V I Mikhailenko

  • 1Odessa State Maritime Academy, Didrikhsona 8, 65100, Odessa, Ukraine.

Advances in Colloid and Interface Science
|June 24, 2003
PubMed
Summary

Researchers studied anisole's electronic-vibrational absorption spectra in liquid and wall-adjacent layers. They identified two main absorption centers: monomers and dimers, revealing their concentration dependence on layer thickness.

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Area of Science:

  • Spectroscopy
  • Physical Chemistry
  • Surface Science

Background:

  • Anisole exhibits complex absorption spectra influenced by its molecular environment.
  • Understanding molecular interactions in thin films is crucial for materials science.

Purpose of the Study:

  • To investigate the electronic-vibrational absorption spectra of anisole.
  • To analyze spectral changes in bulk liquid versus wall-adjacent layers.
  • To identify and quantify different molecular species (monomers, dimers) based on spectral features.

Main Methods:

  • Measurement of electronic-vibrational absorption spectra of anisole.
  • Analysis of spectra at varying liquid interlayer thicknesses on a quartz surface.
  • Statistical analysis to identify distinct absorption centers.

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  • Investigation of isobestic points to confirm the presence of multiple species.

    • Main Results:

    • Isobestic points were observed, indicating the presence of at least two distinct absorbing species.
    • Statistical analysis confirmed two types of absorption centers: anisole monomers and dimers.
    • The relative concentration of monomers was found to be dependent on the liquid layer thickness.

    Conclusions:

    • Anisole exists as monomers and dimers in the studied liquid layers.
    • The monomer-dimer equilibrium is sensitive to the proximity of the quartz surface and layer thickness.
    • This study provides insights into molecular aggregation and surface interactions in confined liquid systems.