电化学沉积制备光响应聚合物薄膜及其光信息存储应用

Preparation of Photo-responsive Film by Electrochemical Deposition Method and the Application in Optical Information Storage

设计并合成了一种具有较高电化学活性的偶氮苯类光响应前体小分子,并用紫外-可见吸收光谱表征其顺反异构性质.通过电化学沉积方法将小分子前驱体制成表面平整且高度交联的聚合物薄膜,利用交联薄膜致密的堆积方式增强其稳定性.以355 nm双干涉激光辐照薄膜,使其发生光致图案化,形成周期性强及结构完整的表面起伏光栅结构,结果表明,这种在高度交联光响应薄膜基础上形成的光致表面图案化在常用溶剂浸泡和较高温度加热时仍保持清晰的光栅结构,具有较高的稳定性.

In order to improve the stability of photo-isomerization patterning of photo-responsive film based on azobenzene moiety, a new photo-responsive material based on azobenzene moiety with high electrochemical activity was designed and synthesized, named 1,2-bis(4-{[6-(9H-carbazol-9-yl)hexyl]oxy}phenyl) diazene (BHCzAzo) which exhibited a good photo-isomerization ability between trans -configuration and cis -configuration. BHCzAzo was prepared into a highly crosslinked polymer film without any crack or peeling on the surface using electrochemical deposition(ED) method due to the electrochemical activity of carbazole moiety in BHCzAzo. And the stability of the prepared film was enhanced in the result of the compact stacking mode of ED film. The film was irradiated with 355 nm interfering laser beam, and then a periodic pattern of photo-induced surface relief gratings was formed with good morphological surface. The photo-induced pattern was proved to possess high stability using the experiments of being immersed in different common solvent and heated at different temperature. The stability of photo-induced pattern was greatly enhanced by preparing cross-linked film with photo-responsive ability using ED method.