Hu Wei, Chen Mei, Wang Qian, Zhang Lanying, Yuan Xiaotao, Chen Feiwu, Yang Huai
Department of Chemistry and Chemical Engineering, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, P. R. China.
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China.
Angew Chem Int Ed Engl. 2019 May 13;58(20):6698-6702. doi: 10.1002/anie.201902681. Epub 2019 Apr 10.
Thiols are prone to react with a multitude of various functional groups in high yields, which has been widely used for surface- and particle-patterning, bioorganic synthesis, polymer modification, imprint nanolithography, the fabrication of optical components, hydrogel synthesis, and the curing of hard protective coatings. In this work, a chiral thiol with a high helical twisting power was synthesized through a novel synthetic route with high selectivity, yield, and cost-effectiveness. It was then used to fabricate a liquid-crystal composite film with ultra-wide broadband reflection via thiol click chemistry. Cholesteric liquid-crystal materials with broadband reflection have many potential applications for broadband polarizers, polarizer-free displays, organic optical data storage media, smart switchable reflective windows, and continuous waveband laser protection.
硫醇易于与多种不同官能团发生高产率反应，这已广泛应用于表面和颗粒图案化、生物有机合成、聚合物改性、压印纳米光刻、光学元件制造、水凝胶合成以及硬保护涂层的固化。在这项工作中，通过一种具有高选择性、产率和成本效益的新型合成路线合成了一种具有高螺旋扭曲能力的手性硫醇。然后通过硫醇点击化学将其用于制备具有超宽宽带反射的液晶复合膜。具有宽带反射的胆甾相液晶材料在宽带偏振器、无偏振器显示器、有机光学数据存储介质、智能可切换反射窗和连续波段激光防护等方面有许多潜在应用。
