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Surface engineering of SPIONs: role of phosphonate ligand multivalency in tailoring their efficacy

机译:SPIONs的表面工程:膦酸酯配体多价在调整其功效中的作用

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We report the design of scaffolds containing mono-, bis-, and tris-phosphonate coordinating groups, and a polyethylene glycol chain, for stabilizing superparamagnetic iron oxide nanoparticles (SPIONs), using simple and versatile chemistry. We demonstrate that the number of anchoring phosphonate sites on the ligand influence the colloidal stability, magnetic and biological properties of SPIONs, and the latter do not solely depend on attaching moieties that can enhance their aqueous dispersion. These parameters can be tailored by the number of conjugation sites on the ligand, as evidenced from dynamic light scattering at various salt concentrations, magnetic relaxivities and cell viability studies.
机译:我们报告的支架设计包含单,双和三膦酸酯配位基团和聚乙二醇链,用于稳定超顺磁性氧化铁纳米粒子(SPIONs),使用简单和通用的化学方法。我们证明了配体上锚定膦酸酯位点的数量会影响SPIONs的胶体稳定性,磁性和生物学特性,而后者并不仅仅依赖于可增强其水分散性的连接部分。这些参数可以通过配体上的缀合位点数量来定制,如各种盐浓度下的动态光散射,磁弛豫和细胞生存力研究所证明。

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