期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 30, 页码 6192-6198出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc00923a
关键词
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资金
- National Basic Research Program of China (973 Program) [2013CB834701]
- Research Grants Council of Hong Kong [604711, 602212, HKUST2/CRF/10, N_HKUST620/11]
- Innovation and Technology Commission [ITCPD/17-9]
- University Grants Committee of Hong Kong [AoE/P-03/08, T23-713/11-1]
- Guangdong Innovative Research Team Program [201101C0105067115]
Non-charged, water soluble poly(ethytene glycol) (PEG)-decorated teraphenylethenes (TPEs) with different polymer chain numbers are synthesized in high yields by azide-alkyne cycloaddition. Their aggregation and thermosensitive behaviours are investigated by means of fluorescence spectroscopy, transmission electron microscopy (TEM), zeta potential and dynamic mechanical analyses. All the luminogens are non-emissive in solutions, but emit intensely when aggregated in aqueous solutions, or forming micelles, demonstrating a phenomenon of aggregation-induced emission. The TPE derivative (1) carrying one PEG chain forms hydrogels in the THF-water mixture depending on the concentration, water fraction and temperature. All the luminogens are thermosensitive, with their cloud point being tunable by varying the solvent composition and their hydrophilicity. Luminogen 1 is biocompatible and can function as a fluorescent visualizer for intracellular imaging.
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