Supramolecular Ensembles Formed between Charged Conjugated Polymers and Glycoprobes for the Fluorogenic Recognition of Receptor Proteins

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• 作者：Wei-Tao Dou ; Ya-Li Zeng ; Ying Lv ; Jiatao Wu ; Xiao-Peng He ; Guo-Rong Chen ; Chunyan Tan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：June 1, 2016
• 年：2016
• 卷：8
• 期：21
• 页码：13601-13606
• 全文大小：490K
• 年卷期：0
• ISSN：1944-8252

文摘

This paper describes the simple construction of a unique class of supramolecular ensembles formed by electrostatic self-assembly between charged conjugated polymers and fluorophore-coupled glycoligands (glycoprobes) for the selective fluorogenic detection of receptor proteins at both the molecular and cellular levels. We show that positively and negatively charged diazobenzene-containing poly(p-phenylethynylenes) (PPEs) can be used to form stable fluorogenic probes with fluorescein-based (negatively charged) and rhodamine B based (positively charged) glycoprobes by electrostatic interaction. The structures of the ensembles have been characterized by spectroscopic and microscopic techniques. The supramolecular probes formed show quenched fluorescence in an aqueous buffer solution, which can be specifically recovered, in a concentration-dependent manner, through competitive complexation with a selective protein receptor, over a range of other unselective proteins. The ensembles also show selective fluorescence enhancement with a live cell that expresses the glycoligand receptor but not a control cell without receptor expression.