期刊
ACS NANO
卷 17, 期 19, 页码 19349-19358出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.3c06697
关键词
cucurbituril; cyclodextrin; supramolecularassembly; energy transfer; NIR luminescence
In this study, phenyl-bridged bis(triphenylamine) derivatives were encapsulated by cucurbit[8]uril to form a network-like organic nanosheet, which enhanced its near-infrared luminescence. Supramolecular nanoparticles were also developed, further improving the near-infrared luminescence. The supramolecular assembly discovered in this study showed efficient phosphorescent resonance energy transfer and was successfully applied in targeted near-infrared cell imaging.
Possessing four cationic pyridium groups, phenyl-bridged bis(triphenylamine) derivatives (G1, G2) were encapsulated by cucurbit[8]uril (CB[8]) at a 1:2 stoichiometry to form the network-like organic two-dimensional nanosheet, which could efficiently enhance the near-infrared (NIR) luminescence and companies with a red-shift from 750 to 810 nm for G1. Benefiting from the supramolecular multivalent interaction, alpha-cyclodextrin modified hyaluronic acid (HACD) and G1/CB[8] formed nanoparticles to further enhance NIR luminescence behaviors. Compared with the short rigid aromatic bridged bis(triphenylamine) derivative (G2), the supramolecular assembly derived from G1 with long flexible cationic arms gives a larger Stokes shift, which further coassembles with the phosphorescent bromophenylpyridinium derivative/CB[8] pseudorotaxane, leading to efficient phosphorescent resonance energy transfer (PRET). Especially, the nanoparticle showed delayed NIR fluorescence under 308 nm light excitation with an ultralarge Stokes shift up to 502 nm, which was successfully applied in targeted NIR cell imaging.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据