离子液体和水: 构建高效绿色的纳米粒子催化体系

金属纳米粒子-保护剂-绿色溶剂体系, 因其高效、绿色, 且易实现反应产物和催化体系分离而备受关注. 新型的纳米粒子催化体系设计空间大, 通过设计纳米粒子、保护剂、功能化溶剂可以实现不同的反应和工艺要求, 也更符合低毒、高效可循环等绿色化学的理念. 本文结合作者课题组设计的纳米粒子-保护剂-绿色溶剂催化体系实现的一系列反应, 回顾了这个绿色的新催化体系发展的过程.     

Research progress of cholesteric liquid crystals with broadband reflection characteristics in application of intelligent optical modulation materials

Cholesteric liquid crystals(CLCs) have recently sparked an enormous amount of interest in the development of soft matter materials due to their unique ability to self-organize into a helical supra-molecular architecture and their excellent selective reflection of light based on the Bragg relationship.Nowadays,by the virtue of building the self-organized nanostructures with pitch gradient or non-uniform pitch distribution,extensive work has already been performed to obtain CLC films with a broad reflection band.Based on authors' many years' research experience,this critical review systematically summarizes the physical and optical background of the CLCs with broadband reflection characteristics,methods to obtain broadband reflection of CLCs,as well as the application in the field of intelligent optical modulation materials.Combined with the research status and the advantages in the field,the important basic and applied scientific problems in the research direction are also introduced.