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Synthesis and Characterization of Eugenia uniflora L. Silver Nanoparticles and L-Cysteine Sensor Application
Chemistry & Biodiversity ( IF 2.3 ) Pub Date : 2022-11-24 , DOI: 10.1002/cbdv.202200787 Isabela Santos Lopes 1 , Fernando Cassas 2 , Thiago André Moura Veiga 3 , Flavia Rodrigues de Oliveira Silva 4 , Lilia Coronato Courrol 1
Chemistry & Biodiversity ( IF 2.3 ) Pub Date : 2022-11-24 , DOI: 10.1002/cbdv.202200787 Isabela Santos Lopes 1 , Fernando Cassas 2 , Thiago André Moura Veiga 3 , Flavia Rodrigues de Oliveira Silva 4 , Lilia Coronato Courrol 1
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L-Cysteine (Cys) is a non-essential sulfur-containing amino acid, crucial for protein synthesis, detoxification, and several metabolic functions. Cys is widely used in the agricultural, food, cosmetic, and pharmaceutical industries. So, a suitable sensitive and selective sensing approach is of great interest, and a low-cost sensor would be necessary. This article presents silver nanoparticles (EuAgNPs) synthesized by a green synthesis method using Eugenia uniflora L. extracts and photoreduction. The nanoparticles were characterized by UV/VIS, transmission electron microscopy, high-performance liquid chromatography (HPLC), FTIR, and Zeta potential. With the addition of Cys in the EuAgNPs solution, the terminal thiol part of L-cysteine binds on the surface of nanoparticles through Ag−S bond. The EuAgNPs and CysAgNPs coexist until flavonoids bound the amino group of Cys, enhancing the red color of solutions. The EuAgNPs provided selectivity to detect Cys among other amino acids, and its detection limit was found to be 3.8 nM. The sensor has the advantages of low-cost synthesis, fast response, high selectivity, and sensitivity.
中文翻译：
紫丁香银纳米粒子的合成与表征及L-半胱氨酸传感器应用
L-半胱氨酸 (Cys) 是一种非必需的含硫氨基酸，对蛋白质合成、解毒和多种代谢功能至关重要。Cys广泛应用于农业、食品、化妆品和制药行业。因此，一种合适的灵敏和选择性传感方法引起了人们的极大兴趣，并且需要一种低成本的传感器。本文介绍了使用Eugenia uniflora L通过绿色合成方法合成的银纳米粒子 ( Eu AgNPs) 。提取物和光还原。通过 UV/VIS、透射电子显微镜、高效液相色谱 (HPLC)、FTIR 和 Zeta 电位对纳米粒子进行了表征。在Eu中加入 CysAgNPs溶液，L-半胱氨酸的末端硫醇部分通过Ag-S键结合在纳米粒子表面。Eu AgNPs 和 CysAgNPs 共存，直到类黄酮与 Cys 的氨基结合，增强了溶液的红色。Eu AgNPs 提供了选择性来检测其他氨基酸中的 Cys，其检测限为 3.8 nM 。该传感器具有合成成本低、响应速度快、选择性高、灵敏度高等优点。
更新日期：2022-11-24
中文翻译：
紫丁香银纳米粒子的合成与表征及L-半胱氨酸传感器应用
L-半胱氨酸 (Cys) 是一种非必需的含硫氨基酸，对蛋白质合成、解毒和多种代谢功能至关重要。Cys广泛应用于农业、食品、化妆品和制药行业。因此，一种合适的灵敏和选择性传感方法引起了人们的极大兴趣，并且需要一种低成本的传感器。本文介绍了使用Eugenia uniflora L通过绿色合成方法合成的银纳米粒子 ( Eu AgNPs) 。提取物和光还原。通过 UV/VIS、透射电子显微镜、高效液相色谱 (HPLC)、FTIR 和 Zeta 电位对纳米粒子进行了表征。在Eu中加入 CysAgNPs溶液，L-半胱氨酸的末端硫醇部分通过Ag-S键结合在纳米粒子表面。Eu AgNPs 和 CysAgNPs 共存，直到类黄酮与 Cys 的氨基结合，增强了溶液的红色。Eu AgNPs 提供了选择性来检测其他氨基酸中的 Cys，其检测限为 3.8 nM 。该传感器具有合成成本低、响应速度快、选择性高、灵敏度高等优点。
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