Structural study of a new Langmuir-Blodgett material designed for nonlinear optical applications

A new bifunctional material, [2-nitro-5-(N-methyl-N-octadecylamino)benzoic acid] (NMOB), has been synthesized and its film forming properties investigated by the Langmuir–Blodgett technique. Pressure-area isotherms indicate that NMOB forms stable monolayers below 40 mN/m which can be transferred to...

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Bibliographic Details
Published in:The Journal of chemical physics 1991-01, Vol.94 (2), p.1603-1612
Main Authors: GEDDES, N. J, JURICH, M. C, SWALEN, J. D, TWIEG, R, RABOLT, J. F
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Physics
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Summary:A new bifunctional material, [2-nitro-5-(N-methyl-N-octadecylamino)benzoic acid] (NMOB), has been synthesized and its film forming properties investigated by the Langmuir–Blodgett technique. Pressure-area isotherms indicate that NMOB forms stable monolayers below 40 mN/m which can be transferred to solid substrates. Multilayered samples were prepared on both transmission and reflection substrates and investigated by Fourier transform infrared (FTIR) spectroscopy. Polarization measurements indicate that the orientation of the NMOB molecules is definitely anisotropic with the alkyl tail tilted considerably relative to the surface while the dye chromophore has its plane oriented primarily parallel to the surface. Changes in this orientation upon interleaving these NMOB layers with deuterated cadmium arachidate spacer layers were also investigated both at room and elevated temperatures.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.459964