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首页> 外文期刊>e-Polymers >Synthesis and characterization of thermosensitive and polarity-sensitive fluorescent PNIPAM-coated gold nanoparticles
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Synthesis and characterization of thermosensitive and polarity-sensitive fluorescent PNIPAM-coated gold nanoparticles

机译：PNIPAM热敏和极性敏感的荧光金纳米粒子的合成与表征

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摘要

Thermosensitive PNIPAM-coated Au nanoparticles (AuNPs@P(NIPAM-co-MADMAC)) were synthesized by the radical “grafting through” copolymerization of 4-methacryloyloxy-4′-dimethylaminochalcone (MADMAC), MAEL-capped AuNPs and N-isopropylacrylamide (NIPAM) using azobisisobutyronitrile (AIBN) as the initiator. AuNPs@P(NIPAM-co-MADMAC) were characterized by transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), 1H nuclear magnetic resonance (NMR), and Fourier transform infrared (FTIR) spectroscopy. AuNPs@P(NIPAM-co-MADMAC) exhibited thermo-sensitivity from poly(NIPAM-co-MADMAC) chains and sensitive fluorescence from the MADMAC group. AuNPs@P(NIPAM-co-MADMAC) showed weak fluorescence after the temperature increased from 25°C to 45°C, or after β-cyclodextrin (β-CD) was added. Furthermore, it exhibited strong fluorescence when the solvent was changed to ethanol or chloroform.
机译：通过自由基“接枝” 4-甲基丙烯酰氧基-4'-二甲基氨基查耳酮（MADMAC），MAEL封端的AuNP和N-异丙基丙烯酰胺（“使用偶氮二异丁腈（AIBN）作为引发剂。 AuNPs @ P（NIPAM-co-MADMAC）通过透射电子显微镜（TEM），紫外可见（UV-Vis）光谱，热重分析（TGA），X射线光电子能谱（XPS），1H核磁共振（ NMR）和傅立叶变换红外（FTIR）光谱。 AuNPs @ P（NIPAM-co-MADMAC）对聚（NIPAM-co-MADMAC）链表现出热敏性，而MADMAC组表现出敏感的荧光。 AuNPs @ P（NIPAM-co-MADMAC）在温度从25°C升高至45°C或添加β-环糊精（β-CD）后显示弱荧光。此外，当溶剂变为乙醇或氯仿时，它显示出强荧光。

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