含量丰富、价格低廉、低毒性的过渡金属Cu(I)配合物在太阳能电池、离子探针、生物检测及光敏剂催化领域有着广阔的应用前景，而具有长寿命、较强发光特性对提高应用效果至关重要。但如何获取长寿命和较高的发光量子效率，研究还很不充分。本项目拟采用五元氮杂环配体类Cu配合物为母体，引入改性的蒽类有机发色基团，通过发色基团的3IL/3LLCT 态与铜配合物的3MLCT 态能级平衡，形成3IL/3LLCT激发态作为一个“贮藏库”来导致持续的3MLCT激发态恢复，实现Cu(I)配合物的长激发态寿命，同时保持较好的发光效率。将系统考察不同电子特性、不同取代位置、不同连接方式在调控三重态3MLCT和3IL/3LLCT态时其发光行为的变化规律。通过研究吸收光谱、发射光谱、瞬态光谱、激发态寿命和量子效率等光物理特性，探索实现长寿命、较强发光效率Cu(I)配合物分子设设计的规律和方法，这无疑对于实际应用具有重要意义。

Cu(I) complexes have attracted considerable attention in a variety of applications such as solar cells, ionic probe, biological sensing, and photocatalysis owing to their abundant, inexpensive, and less toxic properties. Furthermore, the desirable properties of their long excited-state lifetimes and high luminescent quantum efficiencies are essential for enhancing the application effect. However, how to achieve longer excited-state lifetimes while maintaining higher luminescent quantum efficiencies are challenging and the relevant studies are still lacking. With the aim to solve the above questions, in this project, the thermal reversible energy equilibrium between the 3MLCT triplet emissive state of Cu(I) complexes based on the five-ring ligands and 3IL(3LLCT) triplet state of an organic chromophore based on anthanence or their derivatives can be established if the newly introduced triplet level of the organic chromophore attached to metal complexes was essentially isoenergetic with the level of 3MLCT state, and the 3IL or 3LLCT state was served as an “energy reservoir”, leading to a lengthening of the observed excited lifetime, while with a luminescence quantum yield similar to that of the parent complex. Variations in the electrical properties, substituent positions, and linkage modes will be varied to manipulate the energy level of triplet 3MLCT and 3IL/3LLCT states systematically to investigate the change of the photophysical properties of complexes. Absorption spectra, emission spectra, transient spectra, excited-state lifetime and quantum efficiency measurement will be employed to explore the molecular design rule of Cu(I) complexes with the properties of long excited-state lifetimes and high luminescent quantum efficiencies, which is of great significance for the practical application.