紫外光照射对LB膜光学性质的影响

Studies on the Optical Properties of Photoinduced Hemicyanine LB Films

摘要: 通过紫外可见吸收光谱、时间分辨荧光和旋转样品二次谐波方法研究了半花菁和花生酸交替LB多层膜在偏振紫外光照射下的光诱导各向异性 .实验发现 ,在ns紫外偏振光照射下 ,LB多层膜中分子发色团长轴向照射光偏振方向重新取向 ,并使H聚集体程度增强. Polarized UV-visible absorption? fluorescence spectroscop y and second harmonic generation are used to investigate the in-plane orientation of hemicyanine molecules in photoinduced Y-type LB films. Polarized UV nanosec ond laser beam could control the hemicyanine molecular orientation and align chr omophore axes of the hemicyanine along the direction of the UV beam polarization .

Abstract: Polarized UV-visible absorption? fluorescence spectroscop y and second harmonic generation are used to investigate the in-plane orientation of hemicyanine molecules in photoinduced Y-type LB films. Polarized UV nanosec ond laser beam could control the hemicyanine molecular orientation and align chr omophore axes of the hemicyanine along the direction of the UV beam polarization.