四苯基卟啉-聚吡咯纳米复合材料的制备及其非线性光学性能研究

Synthesis and nonlinear optical properties of porphyrin/polypyrrole nanohybrid

利用非共价π-π堆积作用自组装合成了一种四苯基卟啉-聚吡咯纳米复合材料,通过红外光谱、拉曼光谱、扫描电镜、X射线光电子能谱方法对产物进行了表征。并通过紫外可见光谱、荧光光谱研究了复合材料的光物理性能,证明了卟啉与聚吡咯之间具有π-π作用和较强的电子或能量转移效应。用Z扫描技术在4 ns、532 nm激光脉冲下测试聚吡咯、四苯基卟啉以及四苯基卟啉-聚吡咯纳米复合材料的非线性光学性能。结果表明,四苯基卟啉-聚吡咯纳米复合材料的非线性性能比两种前驱体有所增强。

Self-assembled porphyrin/polypyrrole nanohybrid（ Tpp/PPy nanohybrid） has been synthesized through the noncovalent π-π stacking interactions,and was characterized by Fourier transform infrared,Raman spectroscopy,scanning electron microscopy and X-ray photoelectron spectroscopy. The photophysical properties were investigated by Ultraviolet-visible absorption and steady state fluorescence spectroscopic techniques,confirming the presence of prominent π-π interactions and effective photo-induced electron/energy transfer between the porphyrin moieties and PPy. The nonlinear optical（ NLO） properties of PPy,Tpp and Tpp/PPy nanohybrid are investigated by Z-scan method at 532 nm with 4 ns laser pulses.The results indicating that Tpp/PPy nanohybrid exhibits better NLO properties in comparison with the benchmark Tpp and PPy.