Nanoparticles with Near-Infrared Emission Enhanced by Pillararene-Based Molecular Recognition in Water

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• 作者：Bingbing Shi ; Kecheng Jie ; Yujuan Zhou ; Jiong Zhou ; Danyu Xia ; Feihe Huang
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：January 13, 2016
• 年：2016
• 卷：138
• 期：1
• 页码：80-83
• 全文大小：386K
• ISSN：1520-5126

文摘

Here we report the unprecedented preparation of nanoparticles with near-infrared (NIR) emission enhanced by host–guest complexation between a water-soluble pillar[5]arene (WP5) and a cyanostilbene derivative (1) in water. Amphiphilic 1 self-assembles in water to form nanoribbons with relatively weak NIR emission at low concentrations. However, after addition of equimolar WP5, these nanoribbons transform into nanoparticles with stronger NIR emission due to the formation of a supramolecular amphiphile and host–guest complexation-enhanced aggregation. These nanoparticles show pH responsiveness, and collapse after treatment with acid. More importantly, these nanoparticles can be used in living cell imaging.