自组装体系中的手性多步传递、放大与圆偏振发光增强效应

Achieving high dissymmetry factor is a big challenging in supramolecular chiral self-assemblies showing circularly polarized luminescence. In this proposal, circularly polarized luminescence dissymmetry factor of supramolecular assemblies is used as an important index for evaluating the property of supramolecular assemblies. Concentrating on three core scientific issues in this project, this study will try to solve three key issues in circularly polarized luminescence of chiral supramolecular assemblies. First, developing a general approach for enhancing the circularly polarized luminescence towards achieving homochiral assemblies. Second, the mechanism and rule of energy transfer amplified dissymmetry factor of circularly polarized luminescence. Third, exploration and application of the assembled materials with circularly polarized luminescence. This proposal will solve the problem for fabrication of supramolecular self-assemblies with high efficient CPL-activity. In addition, it will provide great support for unveiling the mechanism and rule during chirality transfer, amplification and regulation.

手性超分子自组装体系的圆偏振发光不对称因子的放大是该领域的一个重要科学问题。本项目将以放大超分子自组装体系圆偏振发光不对称因子为研究课题，围绕重大研究计划中的三个核心科学问题，拟重点解决手性组装体系圆偏振发光的三个关键科学问题：一，自组装体系的圆偏振发光增强的普适性方法；二，能量转移放大圆偏振发光不对称因子的机制与规律；三，具有圆偏振发光性质的超分子组装材料的功能化拓展。本项目将为解决圆偏振发光超分子组装材料的高效制备，揭示手性转移、放大和调控的机制和规律等问题提供有力的支撑。

圆偏振发光材料是指一类能够自发的发射圆偏振光的材料，其发射圆偏振光的性能我们称为圆偏振发光性能。由于圆偏振光特殊的偏振性质，圆偏振发光材料在信息传输与加密，光电器件，疾病检测，甚至不对称合成等方面都有广泛的应用前景。然而在目前已知的圆偏振发光材料中，尤其是有机小分子中，圆偏振发光的发光不对称因子（glum）都较小，限制了材料的实际应用。本项目围绕能量转移过程对圆偏振发光材料的性能和glum值的影响开展了一系列的研究，阐明了能量转移放大glum值的规律；展示并发展了逐级放大的高glum值的圆偏振发光材料的构筑方法；制备了多级响应的圆偏振发光材料，并拓展了圆偏振发光材料在逻辑电路，信息加密传输与不对称聚合中的应用。本项目为今后圆偏振发光材料的发展与应用提供了新的方法。