Observation of surface reactions by a highly sensitive Raman spectroscopy

通过高灵敏度拉曼光谱观察表面反应

• 批准号: 08640415
• 负责人: MIZUTANI Goro
• 金额: $ 1.47万
• 依托单位: Japan Advanced Institute of Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640415/
• 关键词: Raman spectroscopy; graphitized mesophase spherules; Ziegler-Natta catalyst; Ziegler-Nattaの触媒; Ziegler-Natta触媒

We have carried out a Raman study to understand the mechanisms of various interesting phenomena concerning surfaces and interfaces. First we have constructed a highly sensitive Raman measurement system. Next we have carried out Raman measurements as follows.(1)We have found that the Raman spectra of graphitized mesophase spherules, heat treated at 2800ﾟC, show interesting change under intense laser irradiation. When they are irradiated with an intense laser beam, the width of the E2g band at 158Ocm^<-1> decreases while the intensity of the D band at 1350cm^<-1> increases, i.e. the correlation between these quantities is negative. We have also observed luminescence from graphitized mesophase spherules under intense laser irradiation. In order to interpret these phenomena, we suggest a model in which the bridge bounds between aromatic molecules in the graphitized mesophase spherules are broken by intense laser irradiation.(2)TiCI_3 is an important component of the Ziegler-Natta catalyst for the production of polyolefins. In order to clarify the mechanism of catalytic reactions, we have measured the Raman spectra of the alpha-TiCl_3 crystal as a first step. The observed spectra show five clear bands. By a normal mode analysis of the lattice vibrations, the five Raman bands can be assigned to three A_g modes, one E_g mode, and one combination mode A_g+E_g.

我们进行了拉曼研究，以了解有关表面和界面的各种有趣现象的机制。首先，我们构建了一个高灵敏度的拉曼测量系统。接下来我们进行了如下的拉曼测量。(1)我们发现，在2800℃的激光照射下，石墨化的中间相球体的拉曼光谱发生了有趣的变化。在强激光束照射下，158Ocm^<-1>处的E2g波段宽度减小，1350cm^<-1>处的D波段强度增大，两者之间呈负相关关系。我们还观察到在强激光照射下石墨化的中间相球体的发光。为了解释这些现象，我们提出了一个模型，其中在石墨化的中间相球中芳香分子之间的桥界被强激光照射打破。(2)TiCI_3是生产聚烯烃的Ziegler-Natta催化剂的重要组分。为了弄清催化反应的机理，我们首先测量了α - ticl_3晶体的拉曼光谱。观测到的光谱有五个清晰的波段。通过对晶格振动的正态分析，可以将5个拉曼波段划分为3个A_g模式、1个E_g模式和1个组合模式A_g+E_g。

项目成果

H.Hirose: "Raman study of the effect of intense laser irradiation on graphitized mesophase spherules" Solid State Communications. 101. 225-229 (1997)

H.Hirose：“强激光照射对石墨化中间相球体影响的拉曼研究”固态通信。

H.Hirose et al.: "Raman study of the effect of intense laser irradiation on graphitized mesophase spherules" Solid State Communications. 101. 225-229 (1997)

H.Hirose 等人：“强激光照射对石墨化中间相球体影响的拉曼研究”固态通信。

H.Miyaoka et al.: "Raman spectrum and normal mode analysis of alpha-TiCl_3 Vibrational Spectroscopy" Vibrational Spectroscopy. 17. 183-186 (1998)

H.Miyaoka等人：“α-TiCl_3振动光谱的拉曼光谱和简正模分析”振动光谱。

H.Miyaoka: "Raman spectrum and normal mode analysis of α-TiCl_3" Vibrational Spectroscopy. 17. 183-186 (1998)

H.Miyaoka：“α-TiCl_3 的拉曼光谱和简正模分析”振动光谱学 17. 183-186 (1998)。

H.Hirose: "Raman study of the effect of intense laser irradiation on graphitized mesophase spherules" Solid State Communications. 101・4. 225-229 (1997)

H. Hirose：“强激光照射对石墨化中间相球体的影响的拉曼研究”101・4（1997）。