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首页> 外文期刊>RSC Advances >One-pot microwave-assisted in situ reduction of Ag+ and Au3+ ions by Citrus limon extract and their carbon-dots based nanohybrids: a potential nano-bioprobe for cancer cellular imaging
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One-pot microwave-assisted in situ reduction of Ag+ and Au3+ ions by Citrus limon extract and their carbon-dots based nanohybrids: a potential nano-bioprobe for cancer cellular imaging

机译：通过柑橘植物提取物及其碳点的纳米嗜碱基（碳点）辅助1罐微波辅助Ag +和Au3 +离子的原位减少：癌细胞成像的潜在纳米生物波堡

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摘要

In the present study, we demonstrate a rapid, in situ reduction of metal (Ag+ and Au3+) ions and subsequent carbonization of Citrus limon (lemon) extract to synthesize highly luminescent carbon-dots (C-dots) and their metal nanohybrids (MCNs) using one-pot microwave (MW) assisted technique within 6 min. In principle, L-ascorbic acid, citric acid and flavonoids reduce metal ions into corresponding metal nanoparticles followed by carbonization of carbohydrates in the lemon extract along with externally added ethylenediamine (EDA) to form EDA-functionalized C-dots based nanohybrids. The synthesized pristine C-dots, Ag/C-dot and Au/C-dot nanohybrids (<5 nm) colloidal solution exhibited bright photoluminescence (PL) at similar to 515 nm with significant quantum yield (QY) of 48.3%, 46.2%, 62.2% and PL emission lifetime of 3.6 ns, 9.4 ns and 9.0 ns respectively. The reduced PL intensity and QY for Ag/C-dot nanohybrids could be due to fluorescence resonance energy transfer (FRET) while enhanced PL intensity and QY for Au/C-dot nanohybrids could be attributed to surface plasmonic resonance (SPR), when compared to pristine C-dots. These C-dots-based nanohybrids exhibited no signs of cytotoxicity in colon cancer cell lines (SW-480) and were easily internalized for fluorescence bioimaging. Thus, the MW-assisted sustainable synthesis of pristine C-dots and metal/C-dot nanohybrids derived from natural lemon extract can be exhibited as eco-friendly intense potential nano-bioprobes for cancer cellular imaging applications.
机译：在本研究中，我们证明了一种迅速，原位还原金属（Ag +和Au3 +）离子和随后的柑橘植物（柠檬）提取物的碳化，以合成高发光的碳点（C点）及其金属纳米嗜型（MCN）在6分钟内使用一锅微波（MW）辅助技术。原则上，L-抗坏血酸，柠檬酸和黄酮醇将金属离子减少到相应的金属纳米颗粒中，然后在柠檬提取物中碳化碳化物，以及外部添加的乙二胺（EDA）以形成EDA官能化的基于纳米型纳米胺。合成的原始C点，Ag / c点和Au / c点纳米嗜含量（<5nm）胶体溶液在类似于515nm的明亮光致发光（pl），其具有48.3％的显着量子产率（qy），46.2％ ，分别为3.6 ns，9.4 ns和9.0ns的62.2％和PL发射寿命。对于AG / C点纳米胺的降低的PL强度和QY可能是由于荧光共振能量转移（FRET），而AU / C点纳米冬小麦的增强PL强度和QY可以归因于表面等离子体共振（SPR），相比原始C点。这些基于C点的纳米嗜含量在结肠癌细胞系（SW-480）中没有表现出细胞毒性的迹象，并且易于内化用于荧光生物成像。因此，衍生自天然柠檬提取物的原始C点和金属/ C-点纳米胺的MW辅助可持续合成可作为癌症细胞成像应用的Eco友好的强烈电位纳米生物体。

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  • 来源
    《RSC Advances》 |2016年第105期|共9页
  • 作者

    Sajid P. A.; Chetty S. Shashank; Praneetha S.; Murugan A. Vadivel; Kumar Yogesh; Periyasamy Latha;

  • 作者单位

    Pondicherry Univ Madanjeet Sch Green Energy Technol Ctr Nanosci &

    Technol Adv Funct Nanostruct Mat Lab Kalapet 605014 Puducherry India;

    Pondicherry Univ Madanjeet Sch Green Energy Technol Ctr Nanosci &

    Technol Adv Funct Nanostruct Mat Lab Kalapet 605014 Puducherry India;

    Pondicherry Univ Madanjeet Sch Green Energy Technol Ctr Nanosci &

    Technol Adv Funct Nanostruct Mat Lab Kalapet 605014 Puducherry India;

    Pondicherry Univ Madanjeet Sch Green Energy Technol Ctr Nanosci &

    Technol Adv Funct Nanostruct Mat Lab Kalapet 605014 Puducherry India;

    Pondicherry Univ Dept Biochem &

    Mol Biol Kalapet 605014 Puducherry India;

    Pondicherry Univ Dept Biochem &

    Mol Biol Kalapet 605014 Puducherry India;

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