Simultaneous determination of average direction of molecular orientation and effective second order nonlinear optical constant (/d(super eff)/) by phase measurements of second harmonic generation

Article Abstract:

A new analytical method of molecular orientation in films that uses phase measurement of second harmonic generation (SHG) with a theoretical curve fitting, and assists in obtaining the average direction of the molecules and the absolute value of the effective second-order nonlinear optical constant (/d(super eff)/) simultaneously, is described. Comparison of the values of /d(super eff)/ obtained with the new method and those obtained using the Maker fringe measurement demonstrate the accuracy of the new method.

Thermal properties, Chemistry, Physical and theoretical, Physical chemistry

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X-ray diffraction studies of multiple orientation in poly(9,9-bis(2-ethylhexyl)fluorene-2,7-diyl) thin films

Article Abstract:

The structural investigation of poly(9,9-bis(2-ethylhexyl)fluorine-2,7-diyl) (PF2/6) in aligned thin films is reported. It is concluded that PF2/6 shows a highly ordered self-assembled structure in macroscopically high quality films and shed new light on the optimization of liquid crystalline conjugated polymers.

Industrial Gas Manufacturing, Industrial gases, Fluorine, X-ray diffraction, Structure, Chemical properties

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