Haro Marta, Gascón Ignacio, Aroca Ricardo, López M Carmen, Royo Félix M
Departamento de Química Orgánica-Química Física, Facultad de Ciencias, Universidad de Zaragoza, Plaza de San Francisco s/n, 50009 Zaragoza, Spain.
J Colloid Interface Sci. 2008 Mar 1;319(1):277-86. doi: 10.1016/j.jcis.2007.10.009. Epub 2007 Oct 11.
The fabrication of Langmuir and Langmuir-Blodgett (LB) films of an acid-azopolymer (PAzCOOH) is reported. Several techniques were used in their characterization: surface pressure (pi) and surface potential (DeltaV) isotherms, UV-vis reflection spectroscopy, and Brewster angle microscopy (BAM) for the Langmuir films and contact angle measurements, UV-vis, fluorescence, IR and Raman spectroscopy and scanning electronic microscopy (SEM) for the LB films. Our study reveals that lateral chains of the polymer situate preferentially onto the water surface with the acid group in contact with the water, where aggregates are scarcely formed. Therefore, the lateral chains of PAzCOOH can be treated as individual monomers to determine structural properties of the fabricated Langmuir and LB films. Monomeric treatment has been used to interpret UV-vis reflection spectroscopy, and a monomer model has been performed to represent lateral chains using density functional theory at B3LYP 6-31G(d,p) level of theory to assign the observed vibrational spectra.
报道了一种酸性偶氮聚合物（PAzCOOH）的朗缪尔（Langmuir）膜和朗缪尔-布洛杰特（LB）膜的制备。在其表征中使用了几种技术：对于朗缪尔膜，采用表面压力（π）和表面电势（ΔV）等温线、紫外-可见反射光谱以及布鲁斯特角显微镜（BAM）；对于LB膜，则采用接触角测量、紫外-可见、荧光、红外和拉曼光谱以及扫描电子显微镜（SEM）。我们的研究表明，聚合物的侧链优先位于水表面，酸性基团与水接触，在此几乎不形成聚集体。因此，PAzCOOH的侧链可被视为单个单体，以确定所制备的朗缪尔膜和LB膜的结构性质。单体处理已被用于解释紫外-可见反射光谱，并使用密度泛函理论在B3LYP 6-31G(d,p)理论水平上构建了一个单体模型来表示侧链，以归属观察到的振动光谱。
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