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Chem. J. Chinese Universities ›› 2006, Vol. 27 ›› Issue (5): 935.doi:

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Preparation and Characterization of Langmuir-Blodgett Film of Charge-transfer Complex of 2-Octadecyl-7,7,8,8-tetracyanoquino-dimethane and 3,3′,5,5′-Tetramethylbenzidine

WANG Yi-Bing1,2, LU Fei1,2, WEI Ping-Hui1, XI Shi-Quan1, WANG Hai-Shui1*   

  1. 1. Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-10 Published:2006-05-10
  • Contact: WANG Hai-Shui

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Abstract:

Langmuir-Blodgett(LB) films of the mixed-stack charge-transfer(CT) complex of 2-octadecyl-7,7,8,8-tetracyanoquinodimethane(C18TCNQ) and 3,3′,5,5′-tetramethylbenzidine(TMB) were prepared. The structures, molecular orientation and morphology of TMB·C18TCNQ in LB films were characterized by infrared(IR), ultraviolet-visible-near infrared(UV-Vis-NIR) spectroscopies and atomic force microscopy(AFM). From the UV-Vis-NIR and IR spectra, it could be concluded that the TMB·C18TCNQ complex is in a mixed\|stacked arrangement style, and the chromophore planes of both C18TCNQ and TMB are nearly perpendicular to the substrate surface. AFM image shows that the morphology of five-layer LB film of the complex consists of many two-dimensional hexagonal flake microcrystals. The width of these flake microcrystals is about 180 nm.

Key words: Charge-transfer complex; LB films; Preparation method; Structure

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