Studies of Langmuir and Langmuir-Blodgett films of NLO-active amphiphilic 1,3-indanedione derivatives
Studies of Langmuir and Langmuir-Blodgett films of NLO-active amphiphilic 1,3-indanedione derivatives
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DOI：
10.1039/b504445f
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发表时间：
2005-01-01
影响因子：
3.3
通讯作者：
Efrima, S
中科院分区：
文献类型：
--
作者：
Acharya, S;Krief, P;Efrima, S
我们研究了几种具有强非线性光学(NLO)活性的1，3-吲二酮-5，6-二羧酸两亲衍生物的Langmuir膜和Langmuir-Blodgett(LB)膜。研究了不同温度和不同pH值下空气-水界面的表面压力-面积等温线。制备了非中心对称的Z型LB膜。紫外-可见光谱表明薄膜转移均匀。根据偏振的紫外可见光谱计算了分子跃迁力矩的取向。通过紫外-可见吸收光谱和荧光光谱观察到LB膜的堆积现象。用原子力显微镜观察了LB膜的表面形貌，并与椭偏测量仪进行了比较，通过接触角测量研究了LB膜的性质。观察到LB膜产生了显著的二次谐波。为了提高稳定性和倍频性能，制备了两种不同染料的交替层状Y型LB膜。
We studied Langmuir and Langmuir - Blodgett (LB) films of several strong nonlinear optical (NLO) active amphiphilic derivatives of 1,3-indanedione-5,6-dicarboxylic acid. The surface pressure - area ( p - A) isotherms at the air - water interface were investigated at different temperatures and pH values. Non-centrosymmetric Z-type LB films were deposited. UV - visible spectra indicated a uniform film transfer. The orientation of the molecular transition moments was calculated from the polarized UV - visible spectra. Packing within the LB films was observed by UV - visible absorption and fluorescence spectroscopy. The morphology of the LB films was examined by AFM and compared to ellipsometric measurements, and the nature of the films was studied by contact angle measurements. Significant second harmonic generation ( SHG) by the LB films was observed. Alternate layer Y-type LB films of two different dyes were fabricated to achieve enhanced stability and SHG.