Gao Hong, Chen Yi-Dan, Zhang Tie, Ge Jia-Zhen, Fu Da-Wei, Zhang Yi
Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, People's Republic of China.
Inorg Chem. 2022 Jul 18;61(28):10872-10879. doi: 10.1021/acs.inorgchem.2c01295. Epub 2022 Jul 6.
Organic-inorganic hybrid materials with switchable properties have significant potential applications in intelligent devices. There are some conventional ways to obtain optical and/or electric multiple responses, such as asymmetric design, chirality, doping, and structural dimension in hybrid materials. Among them, the homochirality strategy is one of the best ways to regulate the molecular structure and symmetry, thereby ensuring second-harmonic generation (SHG) and dielectric dual response characteristics. Here, we report a homochiral design strategy to obtain noncentrosymmetric [-(HASD)][Cd(SCN)] (HASD = 7-hydroxy-5-azaspiro[4.5]decan) and [-(HASD)][Cd(SCN)]; [-(HASD)][Cd(SCN)] was also synthesized as a comparative experiment to illustrate the relationship between structural chirality and physical properties. With the help of homochiral regulation, the SHG response is excited and dielectric phase transition temperature () is also highly improved. In addition, both the optical SHG and dielectric phase change show an optical/electric switchable response. This work is of great significance for the further exploration of multifunctional molecular switching materials through homochiral chemistry.
具有可切换特性的有机-无机杂化材料在智能设备中具有重要的潜在应用。有一些传统方法可获得光学和/或电学多重响应，例如杂化材料中的不对称设计、手性、掺杂和结构维度。其中，同手性策略是调节分子结构和对称性的最佳方法之一，从而确保二次谐波产生（SHG）和介电双响应特性。在此，我们报道一种同手性设计策略以获得非中心对称的[-(HASD)][Cd(SCN)]（HASD = 7-羟基-5-氮杂螺[4.5]癸烷）和[-(HASD)][Cd(SCN)]；还合成了[-(HASD)][Cd(SCN)]作为对比实验，以说明结构手性与物理性质之间的关系。借助同手性调控，激发了SHG响应，并且介电相变温度（）也大幅提高。此外，光学SHG和介电相变均显示出光学/电学可切换响应。这项工作对于通过同手性化学进一步探索多功能分子开关材料具有重要意义。
