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撤稿文章:使用提取物制备的有机金属银纳米结构对多重耐药细菌具有高效抗菌作用。

Retracted Article: Organometallic Ag nanostructures prepared using extract are highly effective against multidrug-resistant bacteria.

作者信息

Maqbool Qaisar, Kruszka Dariusz, Kachlicki Piotr, Franklin Gregory

机构信息

Institute of Plant Genetics of the Polish Academy of Sciences 34 Strzeszynska Street 60-479 Poznan Poland

出版信息

RSC Adv. 2018 Aug 29;8(53):30562-30572. doi: 10.1039/c8ra05655b. eCollection 2018 Aug 24.

Abstract

is a rich source of high-value plant secondary metabolites that have been used in the treatment of various ailments since ancient times. Herein, we report the conversion of bulk Ag ions into highly potent organometallic Ag nanostructures (OM-Ag-NS) using extract as a phytochelating agent for the first time. Analysis by X-ray diffraction (XRD) of OM-Ag-NS revealed that they are of a hybrid nature and include pure Ag crystal planes and Ag-organic-complex crystal planes. An investigation by scanning electron microscopy (SEM) of the NS revealed the rough nanocube-like morphology of OM-Ag-NS with an average particle size of 32 nm. Ultra-performance liquid chromatography-diode array detector (UPLC-DAD) and Fourier transform infrared (FTIR) spectroscopy of extract and the residue validated the utilization of phytochelating compounds in the synthesis process of OM-Ag-NS. Thermogravimetric analysis (TGA) supplemented the findings of UPLC-DAD and showed the thermal loss of the organic capping agent around OM-Ag-NS between 300 and 320 °C. NanoDrop-ultraviolet and visible (UV) spectroscopic analysis showed that the tailored bandgap energy of OM-Ag-NS was 2.82 eV. Moreover, compared with chemically stabilized Ag nanostructures (CS-Ag-NS), OM-Ag-NS exhibited promising performance against highly virulent multidrug-resistant (NDM-1) and (KPC). Our current findings suggest that is a top candidate for tailoring the potential of NS towards various biological activities.

摘要

是高价值植物次生代谢产物的丰富来源,自古以来就被用于治疗各种疾病。在此,我们首次报道了使用提取物作为植物螯合剂将大量银离子转化为高效有机金属银纳米结构(OM-Ag-NS)。通过X射线衍射(XRD)对OM-Ag-NS进行分析表明,它们具有混合性质,包括纯银晶面和银有机复合晶面。通过扫描电子显微镜(SEM)对纳米结构进行研究发现,OM-Ag-NS具有粗糙的纳米立方体状形态,平均粒径为32nm。对提取物和残留物进行超高效液相色谱-二极管阵列检测器(UPLC-DAD)和傅里叶变换红外(FTIR)光谱分析,验证了植物螯合化合物在OM-Ag-NS合成过程中的利用情况。热重分析(TGA)补充了UPLC-DAD的研究结果,显示OM-Ag-NS周围有机封端剂在300至320°C之间的热损失。NanoDrop紫外可见(UV)光谱分析表明,OM-Ag-NS的定制带隙能量为2.82eV。此外,与化学稳定的银纳米结构(CS-Ag-NS)相比,OM-Ag-NS对高毒力多重耐药菌(NDM-1)和(KPC)表现出有前景的数据。我们目前的研究结果表明,是调整纳米结构对各种生物活性潜力的首选。 (注:原文中部分细菌名称未完整给出,翻译时保留原文形式)

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