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Chem. J. Chinese Universities ›› 1995, Vol. 16 ›› Issue (S1): 275.

• Articles • Previous Articles     Next Articles

Langmuir-Blodgett Film Formation and Optical Second Harmoni Generation of a Hemicyanine Derivative

LIU Yun-qi1, XU Yu1, ZHU Dao-ben1, ZONG Yun2, QIN Jin-gui2, XIA Xiao-hua3, ZHAO Xin-sheng3   

  1. 1. Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China;
    2. Department of Chemistry, Wuhan University, Wuhan, 430072, P. R. China;
    3. College of Chemistry and Molecular Engineering, Peking University, Beijing, 1000871, P. R. China
  • Received:1995-08-03 Online:1995-12-31 Published:1995-12-31
  • Supported by:

    National Natural Science Foundation of China, Supported by Laboratory of Organic Solids, Chinese Academy of Sciences, a Key Project of Chinese Academy of Sciences, National 863 High Technique Program,NNSFC and Climbing Program

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Abstract:

Langmuir-Blodgett (LB) film of a hemicyanine derivative, (E)-N-hexadecyl-4-[2-(4-dimethylaminophenyl)ethenyl]pyridinium bromide (Hc) was fabricated. The Langmuir film of Hc exhibited good transfer behaviour. Optical second harmonic generation from the LB film was measured. Macroscopic second-order susceptibilily, molecular hyperpolarizability and tilt angle for the molecules on a substrate were estimated to be 7.06×10-6 esu, 6.47×10-27 esu,and 31.6° respectively.

Key words: Hemicyanine, Langmuir-Blodgett films, Second harmonic generation

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