Various orientations of pendant dye attached to polyamic Langmuir and Langmuir-Blodgett films studied by an optical second-harmonic generation interferometry technique

Toshiki Tamada, Shiyoshi Yokoyama, Kotaro Kajikawa, Ken Ishikawa, Hideo Takezoe, Atsuo Fukuda, Masa aki Kakimoto, Yoshio Imai

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)

Abstract

The pendant dye attached to the polyamic acid backbone in the monolayer Langmuir film is directed toward the air side from the polymer main chain, so that the monolayer has a second-harmonic (SH) active CαV symmetry where the symmetry axis is along the surface normal. The orientation is maintained in the monolayer Langmuir-Blodgett (LB) film obtained by vertical deposition. Since the counter ammonium ion with long alkyl chain functions as a pillar to support the dye moieties, the structure is changed owing to the removal of the counter ion by imidization: the dye moieties collapse and lie along the surface in the polyimide monolayer LB film in the air. However, the dye moiety attached to polyimide maintains the SH-active CαV symmetry in benzene solution, since the dye orientation is supported by the interaction with the solution.

Original languageEnglish
Pages (from-to)754-757
Number of pages4
JournalThin Solid Films
Volume244
Issue number1 -2 pt 3
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes
EventProceedings of the 6th International Conference on Organized Molecular Films. Part 3 (of 3) - Trois-Rivieres, Que, Can
Duration: Jul 4 1993Jul 9 1993

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Various orientations of pendant dye attached to polyamic Langmuir and Langmuir-Blodgett films studied by an optical second-harmonic generation interferometry technique'. Together they form a unique fingerprint.

Cite this