Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province , Guizhou University , Guiyang , Guizhou 550025 , China.
ACS Appl Mater Interfaces. 2018 Apr 18;10(15):13048-13052. doi: 10.1021/acsami.8b02573. Epub 2018 Apr 5.
Energy transfer and interchange are central for fabricating white light-emitting organic materials. However, increasing the efficiency of light energy transfer remains a considerable challenge because of the occurrence of "cross talk". In this work, by exploiting the unique photophysical properties of cucurbituril-triggered host-guest interactions, the two complementary luminescent colors blue and yellow for white light emission were independently obtained from a single fluorophore dye rather than energy transfer. Further study suggested that the rigid cavity of cucurbiturils efficiently prevented the aggregation of the dye and improved its thermal stability in the solid state by providing a regular nanosized fence for each encapsulated dye molecule. As a result, a novel macrocycle-assisted supramolecular approach for obtaining solid, white light-emitting organic materials with low cost, high efficiency, and easy scale-up was successfully demonstrated.
能量传递和交换对于制备白光发射有机材料至关重要。然而，由于“串扰”的发生，提高光能传递效率仍然是一个相当大的挑战。在这项工作中，通过利用葫芦脲引发的主客体相互作用的独特光物理性质，我们从单个荧光染料中独立获得了用于白光发射的两种互补发光颜色——蓝色和黄色，而不是通过能量转移来实现。进一步的研究表明，葫芦脲的刚性空腔通过为每个封装的染料分子提供规则的纳米级围栏，有效地防止了染料的聚集，并提高了其固态下的热稳定性。结果，成功展示了一种新颖的大环辅助超分子方法，用于获得具有低成本、高效率和易于规模化的固态、白光发射有机材料。
