亚相中离子对半花菁多层膜光学性质的影响  

Effects of Divalent Ions in Subphase on Optical Properties of Hemicyanine Langmuir Blodgett multilayers

作　　者：韩奎[1] 陆兴泽[1] 徐建华[1] 马世红[1] 刘丽英[1] 王文澄[1] 

机构地区：[1]复旦大学物理系激光物理研究室与三束材料改性国家重点实验室

出　　处：《中国激光》1999年第7期656-660,共5页Chinese Journal of Lasers

摘　　要：研究了亚相中二价阳离子Ｃｄ２＋，Ｂａ２＋，Ｃｏ２＋对非活性氮冠醚分子的π－Ａ曲线、半花菁／氮冠醚Ｙ型交替多层膜的紫外可见吸收光谱、稳态荧光光谱和光学二次谐波强度的影响。在氮冠醚分子的单层膜中，分子的占有面积依赖于亚相中的离子。交替多层膜的吸收峰位置、稳态荧光峰的位置和光学二次谐波强度由亚相中的离子所调制，并且解释了可能的物理机制。The surface pressure area isotherms of a new type of two legged inert amiphiphilic molecule 1. 10 bistearyl 4.6.13.15 tetraene 8 nitrogen 6(abbreviated as NC) monolayers at the air water interface in the subphase containing divalent ions (Cd 2+ ,Ba 2+ ,Co 2+ ) and the effects of divalent ions in the subphase on the UV visible absorption spectroscopy, steady state fluorescence spectroscopy and optical nonlinear properties of Y type hemicyanine/NC interleaving Langmuir Blodgett multilayers were investigated. The π A isotherms of NC molecules are strongly dependent on the divalent ions in the subphase. It was found that the peak positions of absorption and steady state fluorescence spectra of the alternating multilayers and the optical second harmonic intensity varied with the divalent ions in the subphase. The 2ω resonance effect of β was responsible for the observed χ (2) enhancement.

关 键 词：二阶光学非线性 LB多层膜 半花菁 氮冠醚 

分 类 号：O437[机械工程—光学工程] TN204[理学—光学]