Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry , Chinese Academy of Sciences , Beijing 100190 , China.
University of Chinese Academy of Sciences , Beijing 100049 , China.
ACS Appl Mater Interfaces. 2018 Mar 7;10(9):8225-8230. doi: 10.1021/acsami.8b00341. Epub 2018 Feb 23.
Chiral self-assembled organic nanoparticles with circularly polarized luminescence (CPL) properties can be utilized as a new kind of chiral luminescent materials for practical applications. However, no such chiral organic nanoparticles with full-color and white CPL properties have been reported so far. Herein, five pairs of self-assembled chiral nanoparticles based on optically stable helical aromatic amide enantiomers were conveniently obtained. The chiral nanoparticles showed about 200 nm uniform sphere, high fluorescence quantum yields, and large Stokes shifts. Especially, the chiral nanoparticles exhibited both obvious mirror-image circular dichroism signals and full-color CPL properties with luminescence dissymmetry factors of about 10, which were comparable to those of CPL-active quantum dots. Moreover, the chiral organic nanoparticles with white CPL could also be easily achieved using the three-primary-color enantiomers via intermolecular energy resonance transfer.
手性自组装有机纳米粒子具有圆偏振发光 (CPL) 特性，可用作新型手性发光材料，具有实际应用价值。然而，目前尚未报道具有全彩和白光 CPL 特性的此类手性有机纳米粒子。在此，我们方便地获得了基于光稳定螺旋芳香酰胺对映体的五对自组装手性纳米粒子。这些手性纳米粒子呈现出约 200nm 的均匀球体，具有高荧光量子产率和大斯托克斯位移。特别是，这些手性纳米粒子表现出明显的镜像圆二色信号和全彩 CPL 特性，发光不对称因子约为 10，与 CPL 活性量子点相当。此外，通过分子间能量共振转移，还可以使用三原色对映体轻松实现具有白光 CPL 的手性有机纳米粒子。
