Photochromic Bisthenylethene Functional Materials Based On TTF

During the photoisomerization process of the photochromic compounds, not only the absorption spectra but also the photochemical and photophysical properties of the compounds will be changed, such as electric constant, refractive index, luminescence, oxidation-reduction potential and so on. Among these outputs, luminescence is considered as one of the most promising application for optical information storage and molecular switches owing to its easy operation, fast response and preparation devices with low-cost. In recent years, photochromic bisthenylethene compounds have aroused surge of interest with their excellent thermal stability and fatigue resistance properties.The main content of this paper and the results are generalized as the following several aspects:In Chapter one, the progress of organic photochromic materials was reviewed. And the emphasis of review was paid to the types, synthetic methods, photochromic properties and the promising application of bisthenylethene. In practical application, the organic multi-switchable photochromic materials with high thermally stability, excellent resistance to fatigue, high quantum yield should be developed.In Chapter two, two compounds have been synthesized by covalenttened Tetrathifulvalene (TTF) to a bisthenylethene (BTE) unit. The photochromic behaviors of open and closed isomers were thoroughly studied using photochemical, electrochemical, and spectroelectrochemical. The target compounds showed good photochromic and electrochemical properties. Moreover, the influences between TTF and BTE were also investigated.In Chapter three, incorporating TTF to the designed compound DTE-TTF. The photochromic and electrochemical properties of target compound were also investigated.In Chapter four is the conclusion.