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首页> 外文期刊>Journal of Materials Science >Highly efficient fluorescence probe for copper (II) ions based on gold nanoclusters supported on wool keratin
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Highly efficient fluorescence probe for copper (II) ions based on gold nanoclusters supported on wool keratin

机译：基于羊毛角蛋白的金纳米蛋白的铜（II）离子高效荧光探针

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摘要

A highly efficient fluorescence gold nanoclusters probe for copper (II) (Cu2+) ions among various ions has been prepared through wool keratin as chelating and reducing agent. The main features of fluorescent gold nanoclusters supported on wool keratin (AuNCs@WK) probe are the high fluorescence in aqueous solution, the simplicity of synthesis and the hypotoxicity for living cells. The fluorescence probe exhibits high stability of pHs and shows more sensitivity under acidic condition. Upon exposure to various metal irons, only AuNCs@WK system with Cu2+ ions shows a fluorescence turnoff response changing from red to blue under UV light, which lead to the dramatically decreased fluorescent intensity of AuNCs@WK at 690 nm. Moreover, the high sensitivity of AuNCs@WK around 1 A mu M meets the need of detection standards. The slope of Stern-Volmer plot at low concentration of Cu2+ ions is greater than it at high concentrations, which indicates the aggregated AuNCs are from small amounts to large numbers with the increasing concentration of Cu2+ ions. The design mechanism of AuNCs@WK probe is the coordination of reactive groups to produce the complex (wool keratin-Cu-wool keratin) at 1:2 between Cu2+ ions and fluorescence probe. Furthermore, the cytotoxicity in cells indicates that AuNCs@WK system is safe for the selective imaging of copper ions in living cells.
机译：通过羊毛角蛋白作为螯合和还原剂制备各种离子中的铜（II）（Cu2 +）离子的高效荧光金纳米蛋白探针。羊毛角蛋白（Aunc @ WK）探针支持的荧光金纳米蛋白的主要特征是水溶液中的高荧光，合成简单性和活细胞的低毒性。荧光探针表现出高稳定性的pH，并且在酸性条件下显示出更多的敏感性。在暴露于各种金属熨斗时，仅具有Cu2 +离子的Auncs @ WK系统显示荧光槽响应在UV光下从红色变为蓝色，这导致690nm的Auncs @ WK的荧光强度显着降低。此外，Auncs @ WK大约1 a mu m的高灵敏度达到了检测标准的需要。在低浓度的Cu 2 +离子下的船尾波特图的斜率大于高浓度，其表示聚集auncs从少量少量与Cu 2 +离子的浓度的增加。 Auncs @ WK探针的设计机制是在Cu 2 +离子和荧光探针之间在1：2处在1：2处产生复合物（羊毛角蛋白-Cu-Wool角蛋白）的配位。此外，细胞中的细胞毒性表明Auncs @ WK系统是安全的活细胞中铜离子的选择性成像安全的。

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  • 来源
    《Journal of Materials Science》 |2018年第6期|共11页
  • 作者

    Xing Yao; Zhao Dan; Gu Ting; Liu Hong Ling; Yu Wei Dong;

  • 作者单位

    Donghua Univ Coll Text Key Lab Text Sci &

    Technol Minist Educ Shanghai 201620 Peoples R China;

    Xiamen Univ Sch Pharmaceut Sci Fujian Prov Key Lab Innovat Drug Target Res Xiamen 361102 Peoples R China;

    Donghua Univ Coll Text Key Lab Text Sci &

    Technol Minist Educ Shanghai 201620 Peoples R China;

    Donghua Univ Coll Text Key Lab Text Sci &

    Technol Minist Educ Shanghai 201620 Peoples R China;

    Donghua Univ Coll Text Key Lab Text Sci &

    Technol Minist Educ Shanghai 201620 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
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