有机手性超分子共晶微结构的可控构筑及偏振激光性能研究

圆偏振激光，在3D显示、激光加工等诸多领域，具有商业线偏振激光不可比拟的优势和应用前景。手性发光材料，能够在受激状态下发射出左旋或右旋圆偏振光，为构筑低能耗、小尺寸的圆偏振激光提供了重要的契机。然而常见手性发光材料，呈液晶、凝胶等无定形状态，不利于晶体水平的圆偏振激光的制备。因此，发展一种具有规则形貌、能受激增益的手性发光晶体，是构筑超小圆偏振激光的关键。本项目拟采用超分子共结晶策略，选择常见的手性小分子或大环分子为主体，设计合成一系列骨架相似的激光分子为非手性客体，通过调控主-客体相互作用、制备条件，实现手性共晶微结构的可控组装，总结出具有指导意义的组装规律；发展新的光电谱学手段，研究手性共晶的激发态动力学、微腔谐振、受激辐射性质，力争实现低阈值、波长可调的圆偏振激光；揭示手性共晶体系中分子结构/共晶结构/微腔谐振/激光性能之间的构性关系，为构建高性能圆偏振激光，提供新的思路和理论依据。

Circularly polarized lasers (CPLasers), have greater advantages and prospects than those of commercial linearly polarized lasers in many fields such as 3D display and laser processing. Chiral luminescent materials, which can actively emit left-handed or right-handed circularly polarized luminescence upon excitation, provide a great opportunity to construct low-energy, small-sized circularly polarized lasers. However, as-reported chiral luminescent materials are usually amorphous states including the liquid crystal, gel, and so on, which is not conducive to fabricate the crystal-based circularly polarized lasers. Hence, the development of a chiral light-emitting crystal with regular morphology and high gain is the key to the construction of ultra-small circularly polarized lasers. This project would adopt a supramolecular co-crystallization strategy, which selects the common chiral small molecules or macrocyclic molecules as the host, and synthesizes a series of organic laser molecules as the achiral guest, to realize the controllable assembly of cocrystal microstructures by regulating the host-guest interactions and the assembly conditions, and further propose a mechanism for the guidance of chiral co-crystal assembly. Developing new photoelectric spectral systems to study the properties of the excited-state dynamics, microcavity resonance and stimulated emission from the chiral cocrystals, and to achieve low-threshold wavelength-tunable circularly polarized lasers. Furthermore, it will reveal the relationship among the molecular structures/cocrystal structures/microcavity resonances/laser performances in chiral supramolecular system to provide novel strategies and theories for the construction of high-performance circularly polarized laser.