An organic UV absorber, cinnamic acid, was intercalated into the interlayer gallery of layered yttrium hydroxynitrate (LYH) via the anion-exchange reaction. The complete replacement of interlayer nitrate by cinnamate was confirmed by thermogravimetric analysis of the obtained intercalation compound (cin-LYH). FT-IR spectra and powder X-ray diffraction patterns before and after intercalation reaction of LYH provided an information on the interaction of cinnamate anions with the inorganic host layer. Measured chemical composition and interlayer distance of cin-LYH and van der Waals dimensions of cinnamate proposed partially interdigitated bilayer arrangement of cinnamate anions in the interlayer space of LYH. The intercalation of cinnamate into the inorganic LYH layers highly improved its thermal stability in comparison with pure cinnamic acid. The comparison of reflectance spectra of pure cinnamic acid and cin-LYH before and after exposure to solar-simulated radiation showed that the trans- to cis- photoisomerization of cinnamate accompanied with a significant change of the molecular packing is not facilitated in the interlayer space of LYH. In contrast, only a slight variation in width and position of absorption band indicated no strong interaction between aromatic groups of cinnamate in the interlayer space of LYH. Quartz glasses coated with cin-LYH could be readily obtained by a simple dip-coating method in colloidal solutions and showed effective UV-filtering ability particularly in UV-B region (280–320 nm) without significant loss of the transparency of quartz glass. The release studies revealed that the interlayer space of LYH is effective for the retention of cinnamate for long time and this release reaching an equilibrium state at low concentration is suitable for long-term UV-screening service.

通过阴离子交换反应将有机紫外线吸收剂肉桂酸插入层状羟基硝酸钇（LYH）的层间通道中。通过热重分析所获得的插层化合物（cin-LYH），证实肉桂酸完全替代了层间硝酸盐。LYH插入反应前后的FT-IR光谱和粉末X射线衍射图提供了肉桂酸阴离子与无机主体层相互作用的信息。测量了cin-LYH的化学组成和层间距离以及肉桂酸酯的范德华尺寸，提出了LYH层间空间中肉桂酸酯阴离子的部分叉指式双层排列。与纯肉桂酸相比，将肉桂酸酯插入无机LYH层可大大提高其热稳定性。在LYH的层间空间中，肉桂酸酯的反式至顺式光异构化伴随着分子堆积的显着改变。相反，吸收带的宽度和位置仅有微小变化，表明在LYH的层间空间中肉桂酸酯的芳族基团之间没有强烈的相互作用。可以通过简单的浸涂法在胶体溶液中容易地获得用cin-LYH涂层的石英玻璃，并显示出有效的紫外线过滤能力，尤其是在UV-B区域（280-320） 纳米），而石英玻璃的透明度没有明显损失。释放研究表明，LYH的层间空间可长时间有效地保留肉桂酸酯，并且该释放在低浓度下达到平衡状态适用于长期的紫外线屏蔽。