具有激发态质子转移效应的苯并咪唑衍生物非线性光学特性研究

项目名称： 具有激发态质子转移效应的苯并咪唑衍生物非线性光学特性研究

项目编号： No.11204214

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理学I

项目作者： 吴峰

作者单位： 天津理工大学

项目金额： 26万元

中文摘要： 质子转移化合物是一种能够产生激发态质子转移和电子态能够发生很大变化的有机光电材料，由于具有较大的三阶光学非线性，它们在光控制，分子开关和光限幅方面有着重要的应用价值。近些年来，对它们的研究成为国际上的研究热点课题之一。本项目中，将开展不同分子结构的苯并咪唑衍生物激发态质子转移非线性光学特性的理论和实验研究，使用不同脉冲宽度及不同频率的激光来获得苯并咪唑衍生物在纳秒、皮秒以及飞秒时域和从可见到红外不同频域下的非线性光学特性，并以此为基础，分析结构变化、供体和受体间相互作用方式以及溶剂环境对光学非线性的影响，并在获得其变化规律后，开展对此类质子转移衍生物的光学非线性幅度有效调控研究，为寻找用于控制光学非线性的分子材料提供了有效途径。我们希望通过该项目研究工作，争取能够在国际上形成自己的研究特色。

中文关键词： 激发态质子转移；非线性光学特性；苯并咪唑衍生物；双光子吸收；

英文摘要： The compounds with excited-state proton transfer(ESPT) are one kind of organic optoelectronic material,which undergo photoinduced ESPT process and provide a great change of electronic state in the ESPT process.Their large third-order optical nonlinearity allow them to be potentially used in the optoelectronic field, such as optical control,molecular switching devices, optical limiter and etc. In recent years, the research for this kind of organic compounds becomes one focus in the nonlinear optic fields.In our project, we plan to carry out the theoretical and experimental study on their optical nonlinearity of the benzimidazole derivatives of the different molecular structure in the different time and frequency domain under the excitation of nanosecond,picosecond and femtosecond laser pulse. Based on these studies, we analyze the influence of structure change, the interaction mode of protonic donor and acceptor, and solvent environment .After the variation law is grasped, we will perform the investigation on the effective regulation of the magnitude of the optical nonlinearity. This research may provide the effective approach for the sake of the pursuit of the optical-nonlinearity-controled organic materials.Through this investigation from the project, it is expected that we endeavour to form our research char

英文关键词： excited state proton transfer；nonlinear optical properties；benzimidazole derivatives；two-photon absorption；