Photochemical switching in conductive Langmuir-Blodgett films

Journal Article · Wed Apr 12 00:00:00 EDT 1989 · Journal of the American Chemical Society; (USA)

DOI:https://doi.org/10.1021/ja00190a061· OSTI ID:5295496

Tachibana, Hiroaki; Nakamura, Takayoshi; Matsuboto, Mutsuyoshi; Komizu, Hideo; Manda, Eiichiro; Niino, Hiroyuki; Yabe, Akira; Kawabata, Yasujiro ^[1]

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1. National Chemical Laboratory for Industry, Ibaraki (Japan)

Conductive Langmuir-Blodgett (LB) films have recently attracted much interest from the viewpoint of ultrathin film conductors at the molecular level. We have reported that the structure of the TCNQ (7,7,8,8-tetracyanoquinodimethane) column in the LB film of N-docosylpyridinium 7,7,8,8-tetracyanoquinodimethane is changed by the variation of the subphase temperature. In addition, a partial charge transfer state of N-docosylpyridinium bis(7,7,8,8-tetracyanoquinodimethane) is stable at the air-water interface and the as-deposited LB film is highly conductive without doping or any other treatments. It will open up a wide scope of applications of the functions of the LB films can be controlled by external stimuli such as light, heat, or chemical treatments. One of the most promising candidates for this purpose is to introduce a switching unit into an amphiphilic molecule. When the switching unit is triggered by an external stimulus, the signal is conveyed through the transmission unit to the working unit and induces a change in the structure and functions of the working unit. In this paper, we use the azobenzene as the switching unit, the alkyl chain as the transmission unit, and the charge-transfer complex of TCNQ as the working unit. In this arrangement, the photoisomerization of the azobenzene induces the reversible change in the lateral conductivity of the LB film.

• OSTI ID: 5295496
• Journal Information: Journal of the American Chemical Society; (USA), Vol. 111:8; ISSN 0002-7863
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AROMATICS
ISOMERIZATION
PHOTOCHEMICAL REACTIONS
AZO COMPOUNDS
AIR
ELECTRIC CONDUCTIVITY
EXPERIMENTAL DATA
INTERFACES
THIN FILMS
WATER
CHEMICAL REACTIONS
DATA
ELECTRICAL PROPERTIES
FILMS
FLUIDS
GASES
HYDROGEN COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
400500* - Photochemistry