Novel Orientation of Azobenzene Pendant Group in Hybrid Monolayers Composed of Polyimide Langmuir‒Blodgett Film and Alkyl Polysiloxane Self-Assembled Monolayer

Shiyoshi Yokoyama, Toshiki Yamada, Kotaro Kajikawa, Masa aki Kakimoto, Yoshio Imai, Hideo Takezoe, Atsuo Fukuda

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A new technique for preparing hybrid monolayers composed of azobenzene pendant type polyimide LB films and self-assembled alkyl polysiloxane monolayers is reported. The hybrid monolayers were prepared by octadecyltrichlorosilane (OTS) adsorption onto the azobenzene containing LB films. Contact angle measurements suggest a stable formation of the hybrid monolayers after the chemical adsorption of OTS molecules onto the LB films. The molecular orientation was determined by FTIR reflection‒adsorption (RA) spectroscopy and second harmonic generation (SHG) technique. In the hybrid monolayers, the molecular orientation of the azobenzene units is sustained by the tightly packed structure of the self-assembled monolayers. The molecular tilt angles relative to the surface normal direction were estimated to be 16° and 39° for the alkyl chain and the azobenzene unit, respectively. Minimal conformational change was observed even after heating the films to 120 °C.

Original languageEnglish
Pages (from-to)4599-4605
Number of pages7
JournalLangmuir
Volume10
Issue number12
DOIs
Publication statusPublished - Dec 1 1994
Externally publishedYes

Fingerprint

Siloxanes
polysiloxanes
Azobenzene
Self assembled monolayers
polyimides
Polyimides
Silicones
Monolayers
Langmuir Blodgett films
Molecular orientation
adsorption
Adsorption
harmonic generations
Angle measurement
Harmonic generation
Contact angle
heating
azobenzene
Spectroscopy
Heating

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Novel Orientation of Azobenzene Pendant Group in Hybrid Monolayers Composed of Polyimide Langmuir‒Blodgett Film and Alkyl Polysiloxane Self-Assembled Monolayer. / Yokoyama, Shiyoshi; Yamada, Toshiki; Kajikawa, Kotaro; Kakimoto, Masa aki; Imai, Yoshio; Takezoe, Hideo; Fukuda, Atsuo.

In: Langmuir, Vol. 10, No. 12, 01.12.1994, p. 4599-4605.

Research output: Contribution to journalArticle

Yokoyama, Shiyoshi ; Yamada, Toshiki ; Kajikawa, Kotaro ; Kakimoto, Masa aki ; Imai, Yoshio ; Takezoe, Hideo ; Fukuda, Atsuo. / Novel Orientation of Azobenzene Pendant Group in Hybrid Monolayers Composed of Polyimide Langmuir‒Blodgett Film and Alkyl Polysiloxane Self-Assembled Monolayer. In: Langmuir. 1994 ; Vol. 10, No. 12. pp. 4599-4605.
@article{797bdaea9a1f469f88eb2a3c34dd4f39,
title = "Novel Orientation of Azobenzene Pendant Group in Hybrid Monolayers Composed of Polyimide Langmuir‒Blodgett Film and Alkyl Polysiloxane Self-Assembled Monolayer",
abstract = "A new technique for preparing hybrid monolayers composed of azobenzene pendant type polyimide LB films and self-assembled alkyl polysiloxane monolayers is reported. The hybrid monolayers were prepared by octadecyltrichlorosilane (OTS) adsorption onto the azobenzene containing LB films. Contact angle measurements suggest a stable formation of the hybrid monolayers after the chemical adsorption of OTS molecules onto the LB films. The molecular orientation was determined by FTIR reflection‒adsorption (RA) spectroscopy and second harmonic generation (SHG) technique. In the hybrid monolayers, the molecular orientation of the azobenzene units is sustained by the tightly packed structure of the self-assembled monolayers. The molecular tilt angles relative to the surface normal direction were estimated to be 16° and 39° for the alkyl chain and the azobenzene unit, respectively. Minimal conformational change was observed even after heating the films to 120 °C.",
author = "Shiyoshi Yokoyama and Toshiki Yamada and Kotaro Kajikawa and Kakimoto, {Masa aki} and Yoshio Imai and Hideo Takezoe and Atsuo Fukuda",
year = "1994",
month = "12",
day = "1",
doi = "10.1021/la00024a035",
language = "English",
volume = "10",
pages = "4599--4605",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "12",

}

TY - JOUR

T1 - Novel Orientation of Azobenzene Pendant Group in Hybrid Monolayers Composed of Polyimide Langmuir‒Blodgett Film and Alkyl Polysiloxane Self-Assembled Monolayer

AU - Yokoyama, Shiyoshi

AU - Yamada, Toshiki

AU - Kajikawa, Kotaro

AU - Kakimoto, Masa aki

AU - Imai, Yoshio

AU - Takezoe, Hideo

AU - Fukuda, Atsuo

PY - 1994/12/1

Y1 - 1994/12/1

N2 - A new technique for preparing hybrid monolayers composed of azobenzene pendant type polyimide LB films and self-assembled alkyl polysiloxane monolayers is reported. The hybrid monolayers were prepared by octadecyltrichlorosilane (OTS) adsorption onto the azobenzene containing LB films. Contact angle measurements suggest a stable formation of the hybrid monolayers after the chemical adsorption of OTS molecules onto the LB films. The molecular orientation was determined by FTIR reflection‒adsorption (RA) spectroscopy and second harmonic generation (SHG) technique. In the hybrid monolayers, the molecular orientation of the azobenzene units is sustained by the tightly packed structure of the self-assembled monolayers. The molecular tilt angles relative to the surface normal direction were estimated to be 16° and 39° for the alkyl chain and the azobenzene unit, respectively. Minimal conformational change was observed even after heating the films to 120 °C.

AB - A new technique for preparing hybrid monolayers composed of azobenzene pendant type polyimide LB films and self-assembled alkyl polysiloxane monolayers is reported. The hybrid monolayers were prepared by octadecyltrichlorosilane (OTS) adsorption onto the azobenzene containing LB films. Contact angle measurements suggest a stable formation of the hybrid monolayers after the chemical adsorption of OTS molecules onto the LB films. The molecular orientation was determined by FTIR reflection‒adsorption (RA) spectroscopy and second harmonic generation (SHG) technique. In the hybrid monolayers, the molecular orientation of the azobenzene units is sustained by the tightly packed structure of the self-assembled monolayers. The molecular tilt angles relative to the surface normal direction were estimated to be 16° and 39° for the alkyl chain and the azobenzene unit, respectively. Minimal conformational change was observed even after heating the films to 120 °C.

UR - http://www.scopus.com/inward/record.url?scp=0028746631&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028746631&partnerID=8YFLogxK

U2 - 10.1021/la00024a035

DO - 10.1021/la00024a035

M3 - Article

AN - SCOPUS:0028746631

VL - 10

SP - 4599

EP - 4605

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 12

ER -