Abstract In the present work, an anionic azo dye, Orange G, was intercalated into the interlayer domain of Mg-Al layered double hydroxide (LDH) by co-precipitation route. The resulting hybrid material characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), and thermal analysis, including thermal gravimetric analysis (TGA). The PXRD revealed the presence of host-guest interaction between the host matrix and interlayer anionic dye guest, with an expanded interlayer distance. The TGA studies showed that the dye-intercalated layered double hydroxides had higher thermal stability than the pristine dye. Scanning electron microscopy (SEM) method used to get information about the structure and morphology. Finally, photophysical properties of this intercalated hybrid measured by UV–visible diffuse reflectance (UV–VIS/DR) and photoluminescence spectroscopy (PL), which showed that intercalated dye to LDH had higher photostability than the pristine dye. Additionally, simulations studies were conducted using the Materials Studio software. There was a good agreement between calculated and measured X-ray diffraction patterns, and the results indicate that the dye molecules have vertical forms in the interlayer region. These values support to determine the relationship between the dye molecules translocation in the interlayer structure of LDH and thermal and photophysical stabilities of Orange G dye.

中文翻译：

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嵌入染料分子形状和特征对LDH层间光稳定性和热稳定性的影响

摘要 在目前的工作中，阴离子偶氮染料橙色 G 通过共沉淀方法插入到 Mg-Al 层状双氢氧化物 (LDH) 的层间域中。所得混合材料的特征在于 X 射线衍射 (XRD)、傅里叶变换红外光谱 (FT-IR) 和热分析，包括热重分析 (TGA)。PXRD 揭示了主体基质和夹层阴离子染料客体之间存在主客体相互作用，并扩大了层间距离。TGA 研究表明，染料插入的层状双氢氧化物比原始染料具有更高的热稳定性。扫描电子显微镜 (SEM) 方法用于获取有关结构和形态的信息。最后，通过紫外-可见漫反射 (UV-VIS/DR) 和光致发光光谱 (PL) 测量的这种插层杂化物的光物理性质表明，LDH 的插层染料比原始染料具有更高的光稳定性。此外，还使用 ​​Materials Studio 软件进行了模拟研究。计算和测量的 X 射线衍射图之间有很好的一致性，结果表明染料分子在层间区域具有垂直形式。这些值支持确定 LDH 层间结构中染料分子易位与 Orange G 染料的热和光物理稳定性之间的关系。模拟研究是使用 Materials Studio 软件进行的。计算和测量的 X 射线衍射图之间有很好的一致性，结果表明染料分子在层间区域具有垂直形式。这些值支持确定 LDH 层间结构中染料分子易位与 Orange G 染料的热和光物理稳定性之间的关系。模拟研究是使用 Materials Studio 软件进行的。计算和测量的 X 射线衍射图之间有很好的一致性，结果表明染料分子在层间区域具有垂直形式。这些值支持确定 LDH 层间结构中染料分子易位与 Orange G 染料的热和光物理稳定性之间的关系。