Fourier Transform Infrared Spectroscopic Studies on Alternate-Layer Langmuir-Blodgett Films with Nonlinear Optical Properties
Research output: Contribution to journal › Article
The nature and extent of molecular “ordering” in alternate-layer Langmuir-Blodgett films of 4-n-heptadecylamido- 4′-nitrostilbene/stearic acid and a functionalized diarylalkyne (JT11) have been elucidated using infrared linear dichroism. Comparison of intensity ratios of certain infrared bands in the attenuated total reflection and the reflection-absorption spectra has been used to determine the details of the molecular geometrical arrangement from the resulting directions of the selected transition moments. This information, along with spectra of hydrogen-bonded stilbene and stearic acid C=O groups, leads to a predicted “structure” which is consistent with the observation of a rather modest nonlinear optical coefficient. This should lead to an improved design strategy for the successful production of organic nonlinear optical devices.
|Number of pages||5|
|Publication status||Published - 1 Jan 1992|