Development of Nanosecond Laser Photolysis Apparatus for Ultrathin Polymer Films

超薄膜纳秒激光光解装置的研制

• 批准号: 04555218
• 负责人: YAMAMOTO Masahide
• 金额: $ 3.71万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04555218/
• 关键词: Ultrathin Polymer Film; Nanosecond Flash Photolysis; Transient Absorption Spectrum; Photochemical Intermediate; Multipass Sample Cell; Multireflection; High-Sensitive Absorption Measurement; Ultrafast Spectroscopy; マルチチャンネルイメージセンサー; 微小吸収測定

Much attention is being payd to photofunctional thin polymer films. The films have already been used in photoresist, photomemory device, organic photoconductor, thin film for optical components, etc., and they are expected to be the key material of micro devices in the next generation. For the development of novel photofunctional polymer films, photophysical processes and the photochemical intermediates have to be examined in these thin polymer films and the direct observation of these processes is desirable. In this project, a laser photolysis apparatus to study the photo-processes in photofunctional thin polymer films was developed.According to the Lambert-Beer law, the transient absorbance is obtained by the product of molar extinction coefficient, the concentration, and the optical path length. The transient absorption measurements for polymer thin films were difficult due to the short optical path length of the sample films. Therefore, a new multipass sample cell was designed for the measurements of these thin films. This multipass cell improved the system sensitivity almost one order of mugnitude.The main features of the laser photolysis apparatus developed in this research are as follows.1. Wide range of wavelength from 160 nm to 2600 nm.2. Time resolution of 3 ns in UV and visible regions, and of 500 ns in near IR region.3. Easy and accurate transient absorption measurement for thin polymer films.4. The limiting film thickness to measure the transient absorption spectrum was 24 nm.5. Emission decays as well as transient absorption can be measured by changing the optical alignment.6. The operation and data analysis can be controlled and processed by a computer.

光功能聚合物薄膜受到了广泛的关注。该薄膜已应用于光刻胶、光存储器件、有机光导体、光学元件薄膜等领域，有望成为下一代微器件的关键材料。为了开发新型光功能聚合物薄膜，必须对这些聚合物薄膜中的光物理过程和光化学中间体进行研究，并且需要对这些过程进行直接观察。本课题研制了一种激光光解装置，用于研究光功能聚合物薄膜的光过程。根据朗伯-比尔定律，瞬态吸光度由摩尔消光系数、浓度和光程长度的乘积得到。聚合物薄膜的瞬态吸收测量由于样品膜的光程短而变得困难。因此，设计了一种新型的多通样池来测量这些薄膜。该多通单元使系统灵敏度提高了近一个数量级。本研究研制的激光光解装置的主要特点如下：1。波长范围从160纳米到2600纳米。紫外和可见光区的时间分辨率为3ns，近红外区的时间分辨率为500ns。对聚合物薄膜进行简单、准确的瞬态吸收测量。测量瞬态吸收光谱的极限膜厚为24nm .5。通过改变光学对准可以测量发射衰减和瞬态吸收。操作和数据分析可以由计算机控制和处理。

项目成果

H.Katayama: "Interchromophore Interaction of the Excited Triplet State in Poly(naphthylalkyl methacrylate) Copolymer Films" J.Chem.Soc.,Faraday Trans.88. 2743-2746 (1992)

H.Katayama：“聚（甲基丙烯酸萘基烷基酯）共聚物薄膜中激发三重态的发色团间相互作用”J.Chem.Soc.，Faraday Trans.88。

Y.Tsujii: "Exterplex Formation of Poly(3,6-di-tert-butyl-9-vinylcarbazole) and Its Dimeric Model Compounds with Dimethyl Terephthalate Studied by Fluorescence Spectroscopy" Macromolecules. 26. 1411-1416 (1993)

Y.Tsujii：“通过荧光光谱研究聚（3,6-二叔丁基-9-乙烯基咔唑）及其二聚模型化合物与对苯二甲酸二甲酯的Exterplex形成”大分子。

Akira Tsuchida: "Exterplex Intermediate in the Photodimerization of N-Vinylcarbazole" J.Photochem.Photobiol.A:Chem.77. 17-21 (1994)

Akira Tsuchida：“N-乙烯基咔唑光二聚化中的 Exterplex 中间体”J.Photochem.Photobiol.A:Chem.77。

Akira Tsuchida: "(2+2)-Photocycloaddition of N-Vinylcarbazole to Dimethyl Fumarate" J.Chem.Soc.Perkin Trans.2. 1992. 1685-1687 (1992)

Akira Tsuchida：“(2 2)-N-乙烯基咔唑与富马酸二甲酯的光环加成”J.Chem.Soc.Perkin Trans.2。

A.Tsuchida: "Intramolecular Pyrene Excimer Formation of 1,3-Dipyrenylpropanes with Full and Partial Ring Overlaps" J.Phys.Chem.(in press).

A.Tsuchida：“具有完全和部分环重叠的 1,3-二芘基丙烷的分子内芘准分子形成”J.Phys.Chem.（出版中）。