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4,5‐Bis(diphenylthiophosphinoyl)‐1,2,3‐triazolate interaction with gold nanoparticles and flat surfaces to form self‐assembled monolayers
Surface and Interface Analysis ( IF 1.6 ) Pub Date : 2020-06-25 , DOI: 10.1002/sia.6859 Marisol Correa‐Ascencio 1 , Elizabeth K. Galván‐Miranda 1 , Verónica García‐Montalvo 1 , Roberto Cao 2 , Raymundo Cea‐Olivares 1 , Omar Jiménez‐Sandoval 3 , Irma Lucía Vera‐Estrada 3
Surface and Interface Analysis ( IF 1.6 ) Pub Date : 2020-06-25 , DOI: 10.1002/sia.6859 Marisol Correa‐Ascencio 1 , Elizabeth K. Galván‐Miranda 1 , Verónica García‐Montalvo 1 , Roberto Cao 2 , Raymundo Cea‐Olivares 1 , Omar Jiménez‐Sandoval 3 , Irma Lucía Vera‐Estrada 3
Affiliation
The interaction of the 4,5‐bis(diphenylthiophosphinoyl)‐1,2,3‐triazolate (SPTz−) with different gold surfaces was investigated (nanoparticles, an electrode, and flat sheets). Studies on binding affinity of this dithiophosphin‐triazolate on a gold electrode were performed by cyclic voltammetry (CV). Voltammograms exhibit two reductive desorption and only one oxidative readsorption, indicating that once reabsorbed, the molecule achieves a unique conformation. The morphology and average size of modified gold nanoparticles were studied by transmission electron microscopy (TEM) (av. diameter of 5.9 ± 1.8 nm). Further characterization was made by UV‐visible (UV‐vis) spectroscopy showing surface plasmon resonance (SPR) at about 580 nm. The bonding configurations of SPTz− on gold have also been investigated by comparing the FT‐IR and FT‐Raman spectra. The 31P{1H} NMR spectrum of capped nanoparticles exhibited two sharp signals at 30.3 and 29.6 ppm and a very broad signal at 72.7 ppm. X‐ray photoelectron spectroscopy (XPS) showed SPTz− can accomplish a strong interaction with gold nanoparticles through bonds involving a sulfur atom and a nitrogen from the triazole ring with a free terminal PS group, forming self‐assembled monolayers (SAM). This may allow subsequent functionalization through free S/N atoms of the formed SAMs. The SPTz− packing led to a reduction in packing density that permits large spaces between adsorbed headgroups and the inclusion of carbon and oxygen impurities from small molecules; nevertheless, oxidized sulfur or nitrogen species were not detected, indicating the chemical stability of the obtained SAMs.
中文翻译:
4,5-双(二苯基硫代膦酰基)-1,2,3-三唑酸酯与金纳米颗粒和平坦表面的相互作用形成自组装单层
的4,5-双(diphenylthiophosphinoyl)-1,2,3-三唑(SPTz的相互作用- )具有不同的金表面进行了研究(纳米颗粒,电极和平板)。通过循环伏安法(CV)对该二硫代膦三唑化物在金电极上的结合亲和力进行了研究。伏安图显示两个还原性解吸和一个氧化性再吸收,表明一旦被重新吸收,该分子将获得独特的构象。通过透射电子显微镜(TEM)(平均直径为5.9±1.8 nm)研究了改性金纳米颗粒的形貌和平均尺寸。紫外可见(UV-vis)光谱进一步表征,显示在约580 nm处的表面等离振子共振(SPR)。SPTz的绑定配置-还通过比较FT-IR和FT-拉曼光谱研究了金上的金。封端的纳米粒子的31 P { 1 H} NMR光谱在30.3和29.6 ppm处显示两个尖锐信号,在72.7 ppm处显示非常宽的信号。X射线光电子能谱(XPS)显示SPTz -可以通过涉及硫原子和从三唑环具有游离终端PS基中的氮,形成自组装单层(SAM)键完成与金纳米颗粒具有强的相互作用。这可以允许随后通过形成的SAM的自由S / N原子进行功能化。该SPTz -堆积导致堆积密度降低,从而使被吸附的头基之间具有较大的空间,并包含了小分子中的碳和氧杂质。然而,未检测到氧化的硫或氮物质,表明获得的SAM的化学稳定性。
更新日期:2020-06-25
中文翻译:
4,5-双(二苯基硫代膦酰基)-1,2,3-三唑酸酯与金纳米颗粒和平坦表面的相互作用形成自组装单层
的4,5-双(diphenylthiophosphinoyl)-1,2,3-三唑(SPTz的相互作用- )具有不同的金表面进行了研究(纳米颗粒,电极和平板)。通过循环伏安法(CV)对该二硫代膦三唑化物在金电极上的结合亲和力进行了研究。伏安图显示两个还原性解吸和一个氧化性再吸收,表明一旦被重新吸收,该分子将获得独特的构象。通过透射电子显微镜(TEM)(平均直径为5.9±1.8 nm)研究了改性金纳米颗粒的形貌和平均尺寸。紫外可见(UV-vis)光谱进一步表征,显示在约580 nm处的表面等离振子共振(SPR)。SPTz的绑定配置-还通过比较FT-IR和FT-拉曼光谱研究了金上的金。封端的纳米粒子的31 P { 1 H} NMR光谱在30.3和29.6 ppm处显示两个尖锐信号,在72.7 ppm处显示非常宽的信号。X射线光电子能谱(XPS)显示SPTz -可以通过涉及硫原子和从三唑环具有游离终端PS基中的氮,形成自组装单层(SAM)键完成与金纳米颗粒具有强的相互作用。这可以允许随后通过形成的SAM的自由S / N原子进行功能化。该SPTz -堆积导致堆积密度降低,从而使被吸附的头基之间具有较大的空间,并包含了小分子中的碳和氧杂质。然而,未检测到氧化的硫或氮物质,表明获得的SAM的化学稳定性。