In this work, photoresponsive nanomechanical systems were prepared through the intercalation of positively charged photoswitching molecular jacks (azobenzene ionic liquids, Azo-ILs) within montmorillonite (MMT) layers ([email protected]). The study shows that [email protected] are photosensitive and the synthesized molecular jacks could change the basal distances of MMT layers upon UV irradiation. These changes come from changes in the structure and geometry of Azo molecules (i.e., cis–trans isomerization) between clay layers upon UV irradiation. The prepared photoresponsive nanomechanical systems were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA), energy-dispersive X-ray spectroscopy (EDX), field-emission scanning electron microscope (FE-SEM). Moreover, the in vitro release studies were performed in different conditions (upon UV irradiation and darkness) in pH 5.8 at 34 ± 1 °C, and it was found that the release rates from drug loaded [email protected] were higher upon UV irradiation in comparison with the release rates in darkness. According to the release studies, the prepared photoresponsive carriers might be considered as an excellent potential candidate in order to formulate smart sunscreens.

中文翻译：

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光开关纳米机械系统，包括一个纳米容器（蒙脱土）和光驱动分子插孔（偶氮苯-咪唑鎓离子液体）作为药物输送系统；合成，表征和体外释放研究

在这项工作中，通过在蒙脱石（MMT）层（[受电子邮件保护]）内插入带正电的光转换分子插孔（偶氮苯离子液体，Azo-ILs）来制备光响应性纳米机械系统。研究表明，[电子邮件保护]是光敏的，合成的分子插孔在紫外线照射下可以改变MMT层的基础距离。这些变化来自紫外线照射下粘土层之间偶氮分子的结构和几何形状的变化（即顺式-反式异构化）。通过傅立叶变换红外光谱（FT-IR），X射线粉末衍射（XRD），热重分析（TGA），能量色散X射线光谱（EDX），场发射扫描电子显微镜对制备的光响应纳米力学系统进行了表征。 （FE-SEM）。而且，在34±1°C的pH 5.8下，在不同条件下（在紫外线照射和黑暗条件下）进行了体外释放研究，发现与紫外线照射相比，载有药物（受电子邮件保护）的药物释放速率更高。黑暗中的释放速度。根据释放研究，为了配制智能防晒霜，准备好的光敏载体可能被认为是极好的潜在候选者。