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首页> 外文期刊>Journal of Applied Polymer Science >REGULATION OF DYE ASSEMBLY WITHIN WET AND DRY NAFION FILMS
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REGULATION OF DYE ASSEMBLY WITHIN WET AND DRY NAFION FILMS

机译：湿和干Nafion膜中染料组合的调节

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Different forms of Nafion films were prepared and used to exchange phenothiazine and phenazine dye cations. The monomer dye molecules are emittive and the protonated and aggregated dye molecules are nonemittive. A spectrophotometer and spectrofluorometer were used effectively to identify these molecules in the adsorbed state and the control of different forms of dye molecules by Nafion film was clearly established. Protonation of the dye molecules occurred mainly in the proton-exchanged dry Nafion film (H+-Nf), whereas dimerization of dye molecules was predominant in the sodium-exchanged dry Nafion film (Na+-Nf). The higher acidity and narrow ionic cluster and interfacial regions of the dry Nafion films were found to control the protonation and dimerization of dye molecules. The dyes were predominantly in monomeric form in the wet H+- and Na+-Nf films. When the Na+-Nf film was in a wet condition, the ionic cluster and interfacial regions expanded to form a more open structure. When large hydrophobic organic cations like tetrabutyl ammonium ions (Bu4N+) and tetraethyl ammonium ions (Et4N+) were exchanged into the Nafion film, the film structure was totally controlled by these organic cations and, consequently, controlled the monomeric and dimeric forms of dyes in the film. The dye adsorbed dry H+- and Na+-Nf films may find applications in acid-base sensors. (C) 1997 John Wiley & Sons, Inc. [References: 37]
机译：制备了不同形式的Nafion薄膜，并用于交换吩噻嗪和吩嗪染料阳离子。单体染料分子是发光的，质子化的和聚集的染料分子是不发光的。分光光度计和荧光分光光度计可有效地识别吸附状态下的这些分子，并且清楚地确定了Nafion膜对不同形式的染料分子的控制。染料分子的质子化主要发生在质子交换的Nafion干燥膜（H + -Nf）中，而染料分子的二聚化主要发生在钠交换的Nafion干燥膜（Na + -Nf）中。干燥的Nafion薄膜具有较高的酸度和较窄的离子簇和界面区域，可控制染料分子的质子化和二聚化。染料在湿H +-和Na + -Nf膜中主要呈单体形式。当Na + -Nf膜处于湿润状态时，离子簇和界面区域扩展以形成更开放的结构。当大型疏水性有机阳离子（如四丁基铵离子（Bu4N +）和四乙基铵离子（Et4N +））交换到Nafion膜中时，膜结构完全受这些有机阳离子控制，因此控制了染料中单体和二聚体形式的染料。电影。染料吸附的干燥H +-和Na + -Nf膜可在酸碱传感器中找到应用。 （C）1997 John Wiley＆Sons，Inc. [参考：37]

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