Acta Phys. -Chim. Sin. ›› 1998, Vol. 14 ›› Issue (05): 472-476.doi: 10.3866/PKU.WHXB19980518

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Study of Molecular Orientation in Langmuir-Blodgett Films by FTIR

Ding Han-Ming, Wang Hai-Shui, Cui Hai-Ning, Xi Shi-Quan   

  1. Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022
  • Received:1997-08-18 Revised:1997-12-22 Published:1998-05-15
  • Contact: Xi Shi-Quan


The structure information of orientation and packing of molecular chains can be obtained from infrared transmission and reflection-absorbance (RA) spectra. In the present paper, on the basis of Umemura et al., their FORTRAN program of minicomputer was developed and can be run on 486 personal computer. By comparison of infrared transmission and RA intensities, surface enhancement factors and molecular orientation angle were calculated using the above program, and the influence of complex refractive index, angle of incidence, and thickness of LB film were discussed. These results are consistent with that of Umemura et al.

Key words: Infrared spectrum, LB film, Molecular orientation