Spectral and Structural Characteristics of Oxazine 4/Hexadecyltrimethylammonium Montmorillonite Films
Spectral and Structural Characteristics of Oxazine 4/Hexadecyltrimethylammonium Montmorillonite Films
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DOI：
10.1021/cm052715c
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发表时间：
2006-04
影响因子：
8.6
通讯作者：
J. Bujdák;N. Iyi
中科院分区：
文献类型：
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作者：
J. Bujdák;N. Iyi
利用恶嗪4/十六烷基铵溶液在蒙脱土薄膜上的竞争吸附制备了具有改性光学性质的杂化材料。薄膜的特征在于使用线性偏振可见光谱，X射线衍射和荧光光谱。反应物溶液的组成影响吸附在粘土矿物模板上的染料的量，并且其次影响可变染料种类（分离的染料阳离子和染料分子聚集体）的存在。偏振光谱显示，几乎垂直取向的大尺寸的H-聚集体与一个ESTA型分子间的关联。一个更平行的取向发生其他染料物种，如孤立的染料阳离子，H-二聚体，和J-聚集体。表面活性剂的共吸附没有显着改变发色团的取向。蒙脱石层间空间中发色团/表面活性剂含量的变化并未导致显着变化.
Competitive adsorption from oxazine 4/hexadecylammonium solutions on montmorillonite films was used for the preparation of hybrid materials with modified optical properties. The films were characterized using linearly polarized visible spectroscopy, X-ray diffraction, and fluorescence spectroscopy. The composition of the reactant solution influenced the amount of the dye adsorbed on the clay mineral template and secondarily affected the presence of variable dye species (isolated dye cations and dye molecular aggregates). Polarized spectroscopy revealed an almost perpendicular orientation of large-sized H-aggregates with a sandwich-type intermolecular association. A more-parallel orientation occurred for other dye species such as isolated dye cations, H-dimers, and J-aggregates. Coadsorption of the surfactant did not change the orientation of the chromophores significantly. The variation of the chromophore/surfactant amounts in the interlayer spaces of the montmorillonite did not lead to significant change...