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Safranin and cysteine capped gold nanoparticles: spectroscopic qualitative and quantitative studies

机译：Safranin和半胱氨酸盖金纳米粒子：光谱定性和定量研究

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摘要

The interaction between cysteine and safranin with citrate capped gold nanoparticles was studied. All measurements were carried out using resonance light scattering (RLS), UV-vis. absorption and fluorescence spectrometry. The size and surface characteristics of safranin-capped gold nanoparticles in the solution containing cysteine were also investigated by dynamic light scattering (DLS) and transmission electron microscopy (TEM) techniques. The average diameter and surface potential of synthesized GNPs were 19.0 nm and -56.3 mV, respectively. Interaction of the GNPs and safranin or cysteine leads to increases in their sizes and surface potentials. The influence of parameters such as pH, ionic strength of the solution and safranin concentration on the spectrophotometric and spectrofluorimetric characteristics of GNPs was studied. This system was used for determining cysteine content of unknown solutions. In the optimum conditions (pH, 4; sodium chloride, 0.014 M and safranin, 9.0 x 10(-6) M) two linear dynamic ranges (9.0 x 10(-8)-1.0 x 10(-6) M and 5.0 x 10(-6)-9.0 x 10(-5) M) with RSD less than 5% were obtained for cysteine. The limit of detection under the optimized conditions was 3.7 x 10(-8) M of cysteine. Kinetic studies of safranin and cysteine adsorption on the surface of GNPs were carried out and their corresponding rate constants were also calculated using kinetic models.
机译：研究了半胱氨酸与甘草蛋白与柠檬酸封端的金纳米颗粒的相互作用。所有测量均使用谐振光散射（RLS），UV-Vis进行。吸收和荧光光谱法。还通过动态光散射（DLS）和透射电子显微镜（TEM）技术研究了含有半胱氨酸溶液中的Safranin-Lapped金纳米颗粒的尺寸和表面特征。合成的GNP的平均直径和表面电位分别为19.0nm和-56.3mV。 GNP和Safranin或半胱氨酸的相互作用导致其尺寸和表面电位增加。研究了PH值，溶液的离子强度等参数的影响和Safranin浓度对GNPS的分光光度和光谱氟化物特性。该系统用于确定未知解决方案的半胱氨酸含量。在最佳条件下（pH，4;氯化钠，0.014米和Safranin，9.0×10（-6）m）两个线性动态范围（9.0 x 10（-8）-1.0 x 10（-6）m和5.0 x 10（-6）-9.0×10（-5）m）获得少于5％的半胱氨酸。在优化条件下的检测极限为半胱氨酸的3.7×10（-8）m。进行Safranin和半胱氨酸在GNP表面上吸附的动力学研究，并使用动力学模型计算它们的相应速率常数。

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  • 来源
    《RSC Advances》 |2015年第15期|共7页
  • 作者

    Aghajanloo F.; Nouroozi S.; Rostamizadehb K.;

  • 作者单位

    Univ Zanjan Dept Chem Zanjan 3879145371 Iran;

    Univ Zanjan Dept Chem Zanjan 3879145371 Iran;

    Zanjan Univ Med Sci Zanjan Pharmaceut Nanotechnol Res Ctr Zanjan Iran;

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  • 正文语种 eng
  • 中图分类 化学;
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