期刊
POLYMER
卷 52, 期 2, 页码 383-390出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2010.11.048
关键词
Conjugated polymers; Fluorescence; Glucosamine hydrochloride
资金
- Ministry of Science and Technology of China [2007CB808000]
- National Science Foundation of China [20972035, 21002107]
A novel fluorescent conjugated polyelectrolyte with pendant glucosamine hydrochloride clusters was prepared through Cu(I)-catalyzed azide/alkyne click ligation and Suzuki coupling polymerization. Compared with monosugar-functionalized conjugated polymer, the water-solubility and fluorescence quantum yield of the glycocluster-containing polymer (P-3) were significantly improved. As a glucosamine-containing cationic fluorescent polyelectrolyte, the water-soluble fluorescent polymer can interact with heparin through electrostatic bindings, which induce great fluorescence quenching of P-3 due to the polymer aggregation. Furthermore, upon treatment of the P-3 heparin ensemble with protamine, the fluorescence emission of P-3 recovered since the protamine possesses a competitively strong binding affinity to the heparin and thus results in the release of the fluorescent glycopolymer P-3 from the P-3 heparin ensemble. (C) 2010 Elsevier Ltd. All rights reserved.
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