基于1,8-萘酰亚胺的多重手性中心圆偏振发光材料的设计合成及性能研究

Chiral luminescent materials with circularly polarized luminescence (CPL) are arousing widespread interests and concerns due to the potential applications such as 3D display, encrypted transmission and storage of information, photoelectric devices, and even catalysts for asymmetric photochemical synthesis. which turns to be one of the hottest topics in organic photoelectric functional materials in recent years. However, chiral organic molecules usually exhibit small luminescent asymmetry factors which limit their practical applications, and it has been an urgent task to enhance the luminescent asymmetry factors for the organic systems. Materials with multiple chiral centers were proposed to enhance chirality, thus endow the materials with large luminescent asymmetry factors. In this proposal, we design a series of multiple-chiral-center CPL-active materials based on 1,8-naphthalimide which has two reactive sites to be modulated by different chiral groups. By constructing multiple-chiral-center, these materials would show CPL with large luminescent asymmetry factors, moreover, these materials show excellent luminescent properties both in monomolecular solution and in aggregated state. The current work may develop a general method for preparing high luminescent asymmetry factors CPL materials and reveal the relationship between the chirality and multiple chiral centers which will provide a new insight and strategy for the design and preparation of CPL-active materials.

圆偏振发光材料因其在显示、信息加密、存储、光电器件以及不对称光催化等方面具有重要的应用价值，近年来引起了广泛的兴趣与关注，成为有机光电功能材料领域一个新的研究热点。然而，有机分子的圆偏振发光不对称因子值普遍很低，从而限制了这类材料的引用，提升有机发光体系的发光不对称因子成为该研究领域一个比较紧迫的课题。本申请通过多手性中心的构筑，增强分子的手性以提高圆偏振发光不对称因子。本研究计划通过对具有双反应位点的1,8-萘酰亚胺类化合物进行修饰，引入多重手性中心，开发一类同时具有溶液和固态圆偏振发光性质的材料，并实现多手性中心增强的圆偏振发光，发展制备具有高发光不对称因子的圆偏振发光材料的普适性方法，揭示多手性中心与手性表达的关系，为圆偏振发光材料的设计提供新的方法和思路。

手性发光材料由于其在激发态能发射较强的左右圆偏振光，在3D 显示、信息加密存储以及不对称光催化等方面具有重要的应用价值。近年来具有 CPL 性质材料的研究引起了广泛的兴趣, 成为手性与有机光电功能材料领域一个新的研究热点。为了实现圆偏振发光材料在诸如显示、存储以及不对称光催化等方面领域的应用，提高有机发光体系的圆偏振发光性能成为了一个重要的课题。本项目通过超分子自组装的策略，利用分子间弱的相互作用，构筑了同时具有高发光效率和大圆偏振发光不对称因子的体系。为设计以及提升圆偏振发光材料性能提供了新的思路。