发光的超分子组装体由于其优异的光物理性质、独特的组装结构以及潜在的应用而受到越来越多的关注。然而，光学活性前体及其组装体的结构与功能之间的关系尚未充分研究。本申请项目拟通过配位驱动的自组装策略构筑具有配位诱导发光现象的超分子金属笼，并利用该现象理解四苯乙烯配体和金属笼组装体的结构和发光性质之间的关系。一方面，我们利用四苯乙烯的发光展示金属笼空腔的功能和跟踪金属笼串联反应的过程；另一方面，我们将四苯乙烯配体嵌入具有不同环张力的金属笼中以揭示四苯乙烯构象和其发射波长之间的对应关系。通过系统深入的研究，预期将为配位诱导发光现象的理解与发光金属笼的结构设计和功能调控带来新的思路，进一步促进该领域的发展。

Due to their good photophysical properties, unique structures, and potential applications, light-emitting supramolecular assemblies have attracted more and more attention. However, the correlation between structures and functions of the optically active precursors and their assemblies is still elusive. In this project, we aim to construct supramolecular metallacages with metal-coordination-induced emission (MCIE) characteristic by means of metal-ligand interactions. Moreover, we propose to understand the underlying structural and fluorescent interrelation of the ligands and metallacages by probing the MCIE phenomenon. On the one hand, we try to show the attractive function associated with the cavity of metallacage and trace the cage to cage transformations in cascade by exploiting the MCIE of tetraphenyl ethylene (TPE) ligands; On the other hand, under the assistance of TPE ligand-bridged metallacages with different tensions, we are able to correlate the conformation of TPE ligand and its emission wavelength in certain assemblies. Based on these studies, the research proposal is expected to benefit for the understanding of MCIE as well as structural design and functional regulation of emissive metallacages, and then advance the development of light-emitting supramolecular materials.