分子基相变双稳态存储和传感材料的光电性质研究

Multiple switchable physical channels in one material or device cell, simultaneously possessing optical, electrical, thermal and mechanical switchable channels, can realize seamless integration of thermoelectric, optoelectronic, and even mechanical-thermal-opto-electronic multifunctionality to guarantee the high encryption, high integration, high density, high stability and multi-performance storage and sensing. Therefore, molecule-based bistable phase transition materials (organic-inorganic hybrid supramolecular compounds) is a type of new intelligent storage and sensing materials with the structure easy modification tailoring, the synergy of functional blocks, easy to grow high-quality crystals, especially lead and heavy metal-free, energy saving and easy to syncretize with organic and inorganic materials. These characteristics have attracted wide attention. Carrying out the high-performance controlling of molecule-based bistable phase transition materials possess practical significance and academic value. Therefore, it would be important to investigate the underlying mechanism and to develop related theory. Based on the study of order-disorder type molecular materials on the early stage, the project plans to adopt the basic models such as host-guest type and rotator-stator motors, through crystal engineering, to synthesize and regulate bistable state active hydrogen bond type and dipole order-disorder type supermolecule single crystal and membrane. In combination with testing methods from structuralism and physics, the project gives a deep and systematic research into its physical property. By investigating the phase and the controlling theory of molecule-based bistable phase transition materials, we will try to get a high-performance and environment-friendly molecule-based bistable phase transition materials with mechanical-thermal-opto-electronic multifunctionality.

材料同时具备多重开关物理通道（多重双稳态的光电热力等开关通道），则可能实现光电、热电、磁电，甚至光电热力等多重功能的无缝集成，从而保证高的加密、高的集成、高密度、高稳定性、多重性能的存储与传感。因此，分子基相变双稳态存储传感材料是一类非常重要的智能材料。且其结构易修饰剪裁、功能基元协同性、易于制备大尺寸晶体,尤其是无铅无重金属环保节能和易于和有机及无机材料整合等特点。开展相变双稳态存储传感材料的高性能调控、机理和相关理论具有非常重要的意义和学术价值。本项目在前期研究有序无序型分子材料基础上,拟采用主客体结构骨架和转子-定子马达等基本构筑模型，通过晶体工程合成并调控双稳态活性质子氢键型和偶极有序无序型的超分子单晶以及薄膜，并结合结构学和物理学等测试手段对其物理性质进行深入的系统研究。研究该类双稳态相变材料的相变和调控机制,最终获得高性能的环保的新型分子基相变双稳态存储传感材料。

材料同时具备多重光、电、热、力等双稳态特性，可用于超加密和高密度集成的数据存储、通信、信号处理和智能传感器件。分子基相变双稳态存储传感材料是一类非常重要的智能材料，其具有结构易裁剪、功能基元协同性强、易于制备大尺寸单晶，而且无有毒重金属铅，对环境友好等优点。因此，开展相变双稳态存储传感材料的高性能调控、机理和相关理论研究具有非常重要的意义和学术价值。本项目主要采用溶剂法制备高性能光电多功能分子基相变双稳态存储传感材料，同时采用程序控温法制备大尺寸单晶，旋涂法制备柔性薄膜。通过介电测试仪，差示扫描量热仪，二阶非线性测量仪，变温单晶X射线衍射仪和粉末X射线衍射仪等设备表征和分析了材料的光电特性。本项目中，通过分子设计和调控合成了一系列高温相变介电开关双稳态材料，如分子马达型和有机阳离子有序-无序型介电相变材料，并深入研究其结构和相变机理。同时制备了一系列的蓝光和红光发射的介电相变双稳态大尺寸单晶和柔性薄膜，实现了分子基相变材料的光电耦合，促进了高性能新型分子基相变双稳态存储传感材料的发展。