一种可溶喹吖啶酮衍生物LB膜的光谱特性

采用表面压-分子面积(π~A)等温曲线、紫外-可见吸收谱和荧光光谱的方法研究了一种喹吖啶酮衍生物材料LB膜的制备及其光谱特性。实验表明,这种喹吖啶酮衍生物能够在水面上形成稳定的单分子膜,它与花生酸(AA)混合后不仅可以形成很好的单分子膜,而且可以较好的转移到固体基片上制备成LB膜多层膜。这种喹吖啶酮衍生物LB膜的紫外-可见吸收谱的吸收峰位较稀溶液发生了红移,这是由极性溶剂分子与其相互作用的结果。其溶液有很强的荧光效应,但LB膜没有荧光现象,原因是在LB膜中QAC16的浓度过高发生“自我猝息”而失光。它在溶液和LB膜中都是以单体的形式存在。

Spectral Properties of a Novel Soluble Quinacridone Derivative Langmuir-blodgett Films

Spectral properties of a novel soluble quinacridone derivative(QAC16) Langmuir-Blodgett(LB) films were investigated by using the surface pressure-molecule area(π～A) isotherm line,UV-visible absorption spectra and fluorescence spectra method.The experimental results demonstrated that novel soluble quinacridone derivative could form well stable monolayer on subphase surface.The mixed QAC16/arachidic acid not only could form well stable monolayer,but also could be transferred to solid substrate and deposited LB multilayers.The peak wavelength of UV-visible absorption spectra in LB film were red-shifted from the solution absorption spectra due to QAC16 molecule and polarity solvent molecule interaction. The solution of QAC16 have higher fluorescence quantum field.However,the LB films of QAC16 have very lower fluorescence quantum field,because of the higher concentration in LB films,Which lead to fluorescence quenching.QAC16 molecules are monomer formation in both dilute solution and Langmuir-Blodgett films.