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首页> 外文期刊>RSC Advances >3-Aminopropyltrimethoxysilane and organic electron donors mediated synthesis of functional amphiphilic gold nanoparticles and their bioanalytical applications
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3-Aminopropyltrimethoxysilane and organic electron donors mediated synthesis of functional amphiphilic gold nanoparticles and their bioanalytical applications

机译：3-氨丙基三甲氧基硅烷和有机电子给体介导的功能性两亲金纳米粒子的合成及其生物分析应用

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Precise control over functionality and nanogeometry during synthesis of gold nanoparticles (AuNPs) and dispersibility of the same in a variety of solvents has been a challenging requirement for practical applications. Organic reducing agents i.e. 3-glycidoxypropyltrimethoxysilane (3-GPTMS), tetrahydrofuran hydroperoxide (THF-HPO) and cyclohexanone have shown potential for meeting these requirements during the conversion of 3-aminopropyltrimethoxysilane (3-APTMS)-capped gold ions into AuNPs. The reaction products of these reducing agents with 3-APTMS during AuNPs synthesis are catalytic in nature for THF-HPO and cyclohexanone due to the formation of inorganic-organic hybrids and non-catalytic for 3-GPTMS. The presence and absence of such reaction products justify the difference in catalytic ability of the AuNPs as a function of organic reducing agents, which profusely affects the inherent properties of AuNPs for specific applications. The use of cyclohexanone in place of 3-GPTMS or THF-HPO together with 3-APTMS outclasses the other two in imparting better stability to amphiphilic AuNPs with reduced silanol content. The as-synthesized AuNPs enable the formation of nanocomposite (PBNPs-AuNPs) dispersion with Prussian blue nanoparticles (PBNPs). Further, PBNPs-AuNPs may also be converted to homogeneous nanocomposite suspensions with ruthenium bipyridyl solution, justifying even better catalytic ability than that of HRP. The resulting nanomaterial suspensions in one way, efficiently probe the glucose oxidase catalyzed reactions based on peroxidase mimetic ability and, in another way, display excellent electrocatalytic activity during the electrochemical sensing of H2O2. The peroxidase mimetic ability of the nanomaterials has been found to vary as a function of 3-APTMS concentration, which confirms the potential role of functional gold nanoparticles in bioanalytical applications.
机译：精确控制金纳米颗粒（AuNPs）合成过程中的功能和纳米几何形状及其在各种溶剂中的分散性一直是实际应用中的一项挑战性要求。有机还原剂，即3-环氧丙氧基丙基三甲氧基硅烷（3-GPTMS），四氢呋喃氢过氧化物（THF-HPO）和环己酮显示出在将3-氨基丙基三甲氧基硅烷（3-APTMS）封端的金离子转化为AuNP的过程中满足这些要求的潜力。在AuNPs合成过程中，这些还原剂与3-APTMS的反应产物由于形成了无机-有机杂化物而对THF-HPO和环己酮具有催化作用，而对3-GPTMS无催化作用。此类反应产物的存在与否证明了AuNPs催化能力随有机还原剂的变化而不同，这极大地影响了AuNPs在特定应用中的固有特性。与3-APTMS一起使用环己酮代替3-GPTMS或THF-HPO在赋予硅烷醇含量降低的两亲性AuNPs更好的稳定性方面优于其他两种。合成后的AuNPs可以与普鲁士蓝纳米颗粒（PBNPs）形成纳米复合材料（PBNPs-AuNPs）分散体。此外，PBNPs-AuNPs也可以用联吡啶钌溶液转化为均相的纳米复合悬浮液，证明其催化能力甚至优于HRP。所得的纳米材料悬浮液以一种方式有效地探测基于过氧化物酶模拟能力的葡萄糖氧化酶催化的反应，并以另一种方式在H2O2的电化学传感过程中显示出出色的电催化活性。已经发现纳米材料的过氧化物酶模拟能力随3-APTMS浓度的变化而变化，这证实了功能性金纳米颗粒在生物分析应用中的潜在作用。

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