A method for calculating order parameter and determining orientation direction on polarized molecules in organic–inorganic hybrid film
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Molecular orientation in organic–inorganic hybrid films has attracted considerable attention for application in functional materials. When molecules are oriented in a certain direction in such films, optical, mechanical, or electrical anisotropy appears [1, 2]. These films can also be used as templates for aligned pores [3, 4, 5, 6, 7].
Various methods, such as optical absorption and electrical conductivity, can determine orientation direction by measuring the properties parallel and perpendicular to the direction. Polarized IR measurement is one such method . In this method, when a molecule has a functional group parallel or perpendicular to the molecular long axis, the group’s absorption coefficient for polarized light differs from that in the sample direction. If there is a uniaxial group that absorbs IR, the IR absorbance will be highest when the polarized direction is identical to the group’s expansion and contraction directions. When the polarizing plate or the sample is...
KeywordsOrientation Direction Molecular Orientation Optical Anisotropy Peak Ratio Molecular Axis
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan through the Nanotechnology Glass Project.