文献类型：期刊文献

英文题名：Cucurbiturils brighten Au nanoclusters in water

作者：Jiang, Tao[1];Qu, Guojuan[1];Wang, Jie[1];Ma, Xiang[1];Tian, He[1]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Key Lab Adv Mat,Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：11

期号：13

起止页码：3531

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20201508409184);WOS:【SCI-EXPANDED(收录号:WOS:000526696500012)】；

基金：This report was financially supported by the National Natural Science Foundation of China (21788102, 21722603 and 21871083), Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03), 'Shu Guang' project supported by the Shanghai Municipal Education Commission and Shanghai Education Development Foundation (19SG26), Innovation Program of Shanghai Municipal Education Commission (2017-01-07-00-02-E00010) and Fundamental Research Funds for the Central Universities. The authors gratefully acknowledge Prof. Yujian Zhang (Huzhou University) for his kind assistance in measuring quantum yield, Dawei Jiang for the help in cancer cell culture, and Dr Yifan Gong (Fudan University) for the help in recording transient luminescence spectra.

语种：英文

外文关键词：Optical properties - Gold compounds - Biocompatibility - Luminescence - Gold

摘要：Gold nanoclusters (AuNCs) with well-defined atomically precise structures present promising emissive prospects for excellent biocompatibility and optical properties. However, the relatively low luminescence efficiency in solutions for most AuNCs is still a perplexing issue to be resolved. In this study, a facile supramolecular strategy was developed to rigidify the surface of FGGC-AuNCs by modifying transition rates in excited states via host-guest self-assembly between cucurbiturils (CBs) and FGGC (Phe-Gly-Gly-Cys peptide). In aqueous solutions, CB/FGGC-AuNCs presented an extremely enhanced red phosphorescence emission with a quantum yield (QY) of 51% for CB[7] and 39% for CB[8], while simple FGGC-AuNCs only showed a weak emission with a QY of 7.5%. Furthermore, CB[7]/FGGC-AuNCs showed excellent results in live cell luminescence imaging for A549 cancer cells. Our study demonstrates that host-guest self-assembly assisted by macrocycles is a facile and effective tool to non-covalently modify and adjust optical properties of nanostructures on ultra-small scales.