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Facile synthesis of polymer-enveloped ultrasmall superparamagnetic iron oxide for magnetic resonance imaging

机译：聚合物包裹的超小型超顺磁性氧化铁的磁共振成像简便合成

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摘要

Ultrasmall superparamagnetic iron oxide (USPIO) with synthetic polymer, based on magnetite core, was synthesized via facile photochemical in situ polymerization. A possible mechanism of photochemical in situ polymerization was proposed. The obtained polymer-enveloped UPSIO was characterized by transmission electron microscopy (TEM), photo-correlation spectroscopy (PCS), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric (TG) analysis and vibrating sampling magnetometer (VSM) measurement. Properties such as ultrasmall particle size, hydrophilicity, strong magnetization and surface characteristics, which are desirable for magnetic resonance imaging (MRI) contrast agents, were evaluated in detail. The resultant USPIO-based MRI contrast agent holds considerable promise in molecular MR tracking, MR immune imaging, cell tracking and targeted intracellular hyperthermia, etc.
机译：通过简便的光化学原位聚合反应，合成了具有磁铁矿芯的合成聚合物的超小型超顺磁性氧化铁（USPIO）。提出了光化学原位聚合的可能机理。通过透射电子显微镜（TEM），光相关光谱（PCS），傅立叶变换红外光谱（FT-IR），热重分析（TG）和振动采样磁力计（VSM）测量对所得聚合物包裹的UPSIO进行表征。详细评估了磁共振成像（MRI）造影剂所需的特性，例如超小粒径，亲水性，强磁化强度和表面特性。所得的基于USPIO的MRI造影剂在分子MR跟踪，MR免疫成像，细胞跟踪和靶向细胞内热疗等方面具有广阔的前景。

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