Observation of molecular association at liquid/liquid and solid/liquid interfaces by second harmonic generation spectroscopy

Tatsuya Uchida, Akira Yamaguchi, Tomomi Ina, Norio Teramae

研究成果: Article査読

49 被引用数 (Scopus)

抄録

Structural information on rhodamine dyes adsorbed at heptane/water and hydrophobized silica/water interfaces are obtained by in situ second harmonic generation (SHG) spectroscopy. The SHG spectra provide spectroscopic evidence that the molecular association occurs at both interfaces in a different manner depending on their interfacial coverage. At the heptane/water interface, an "in-plane associate" in which the electronic transition dipoles of each monomer are arranged parallel to one another appears as the sole species present. The number of monomer units making up this associate increases with the interfacial coverage while the tilt angle of the monomer unit is kept constant. By contrast, both a "sandwich dimer" and the in-plane associate are observed at the hydrophobized silica/water interface with increasing interfacial coverage. These results successfully demonstrate differences in adsorption behavior and molecular association between liquid/liquid and solid/ liquid interfaces.

本文言語English
ページ(範囲)12093-12094
ページ数2
ジャーナルJournal of Physical Chemistry B
104
51
出版ステータスPublished - 2000 12 28

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Engineering(all)

フィンガープリント 「Observation of molecular association at liquid/liquid and solid/liquid interfaces by second harmonic generation spectroscopy」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル