Reducing aggregation caused quenching effect through co-assembly of PAH chromophores and molecular barriers
Reducing aggregation caused quenching effect through co-assembly of PAH chromophores and molecular barriers
复制标题
DOI：
10.1038/s41467-018-08092-y
复制
发表时间：
2019-01-11
影响因子：
16.6
通讯作者：
Zhang, Qichun
中科院分区：
文献类型：
--
作者：
Huang, Yinjuan;Xing, Jie;Zhang, Qichun
由于p型共轭发光材料具有良好的共轭性和平面性，使得它们在固态或聚集态下都存在聚集猝灭（ACQ）效应，这极大地阻碍了它们在光电器件和生物应用中的应用。在此，我们通过展示一种简便且低成本的方法来将多环芳烃（PAH）发色团和八氟萘共同组装在一起，从而降低ACQ效应。值得注意的是，固体光致发光量子产率（PLQY）为所得的四个微/纳米共晶体分别提高了254%，235%，474%和582%。亲水性聚合物链（P123（PEO 20-PPO 70-PEO 20））的保护赋予共晶在水中极好的分散性。更重要的是，得益于上述高度改进的性质，纳米共晶呈现出良好的生物相容性和可观的细胞成像性能。该研究为增强常见发色团的发光、生物相容性和细胞渗透性提供了一种简单的方法，为原本无荧光或弱荧光的多环芳烃的应用开辟了更多的途径。
The features of well-conjugated and planar aromatic structures make p-conjugated luminescent materials suffer from aggregation caused quenching (ACQ) effect when used in solid or aggregated states, which greatly impedes their applications in optoelectronic devices and biological applications. Herein, we reduce the ACQ effect by demonstrating a facile and low cost method to co-assemble polycyclic aromatic hydrocarbon (PAH) chromophores and octafluoronaphthalene together. Significantly, the solid photoluminescence quantum yield (PLQYs) for the as-resulted four micro/nanococrystals are enhanced by 254%, 235%, 474 and 582%, respectively. Protection from hydrophilic polymer chains (P123 (PEO20-PPO70-PEO20)) endows the cocrystals with superb dispersibility in water. More importantly, profiting from the above-mentioned highly improved properties, nano-cocrystals present good biocompatibility and considerable cell imaging performance. This research provides a simple method to enhance the emission, biocompatibility and cellular permeability of common chromophores, which may open more avenues for the applications of originally non- or poor fluorescent PAHs.