Photochemistry of Linear and Cyclic Carbon Clusters

线性和环状碳簇的光化学

• 批准号: 13640510
• 负责人: WAKABAYASHI Tomonari
• 金额: $ 2.24万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640510/
• 关键词: Carbon cluster; Photodissociation; Spectroscopy; Matrix isolation; Infrared absorption; UV; VIS absorption; Fullerene; Polyyne; 赤外スペクトル; 紫外可視スペクトル

The photoinduced molecular processes of small carbon clusters in cold rare gas matrices are investigated. The purpose of this project is to determine the specific chemical reaction channels of linear and cyclic clusters and to use the knowledge for identification of the unknown UV/VIS absorption bands of the relevant clusters. In this project, we found that the UV absorption band at 235 nm of a carbon-containing Ne matrix at 6 K diminished upon irradiation with 235 nm photons. At the same time, we observed that the IR bands of linear C6 at 1959 cm-1 and 1199 cm-1 diminished concomitantly. Form this observation we concluded that the UV band is attributable to linear C6. Further investigations of the selective excitation of the UV and VIS bands of matrix-isolated carbon clusters lead to a finding of the new electronic system of C2 in a condensed phase that shows a matrix-dependent characteristic relaxation channel through fluorescent deactivations.

研究了冷稀有气体中小碳团簇的光诱导分子过程。本项目的目的是确定线性和环状簇合物的特定化学反应通道，并利用这些知识识别相关簇合物的未知UV/维斯吸收带。在这个项目中，我们发现，在235 nm的紫外吸收带的含碳的Ne矩阵在6 K时，减少与235 nm的光子照射。同时，我们观察到线性C6在1959 cm-1和1199 cm-1处的红外谱带也随之减弱。从这一观察，我们得出结论，UV带可归因于线性C6。进一步调查的选择性激发的UV和维斯波段的矩阵隔离的碳原子簇导致发现的新的电子系统的C2在凝聚相，显示了一个矩阵依赖的特征松弛通道，通过荧光钝化。

项目成果

T.Wakabayashi, A.-L.Ong, W.Kratschmer: "Laser induced fluorescence spectra of the D^1Σ_u^+→B'^1Σ_g^+ and C^1II_g→A^1II_u systems of C_2 in solid Ne"J. Chem. Phys.. 116・14. 5996-6001 (2002)

T.Wakabayashi、A.-L.Ong、W.Kratschmer：“固体 Ne 中 C_2 的 D^1Σ_u^+→B^1Σ_g^+ 和 C^1II_g→A^1II_u 系统的激光诱导荧光光谱”J化学.. 116・14.

Y.Yamaguchi, T.Wakabayashi: "Coagulation of Linear Carbon Molecules into Nanoparticles: A Molecular Dynamics Study"Chem.Phys.Lett.. 388. 436-440 (2004)

Y.Yamaguchi、T.Wakabayashi：“线性碳分子凝结成纳米粒子：分子动力学研究”Chem.Phys.Lett.. 388. 436-440 (2004)

N.Sogoshi, T.Wakabayashi, T.Momose, T.Shida: "Infrared Spectroscopic Study on Photolysis of Ethyl Iodide in Solid Parahydrogen: Perdeuterated Iodide System"J.Phys.Chem.A. 105. 3077-3086 (2001)

N.Sogoshi、T.Wakabayashi、T.Momose、T.Shida：“固体仲氢中碘乙烷光解的红外光谱研究：全氘化碘化物体系”J.Phys.Chem.A.

Y.Kato, T.Wakabayashi, T.Momose: "A mass spectroscopic study of laser ablated graphite in H_2 and D_2 gases : the stability of C_<2n>H_2 (n=2-5) and C_<10>"Chem.Phys.Lett.. 386. 279-285 (2004)

Y.Kato、T.Wakabayashi、T.Momose：“H_2 和 D_2 气体中激光烧蚀石墨的质谱研究：C_<2n>H_2 (n=2-5) 和 C_<10> 的稳定性”Chem.

Y.Kato, et al.: "Preferential formation of neutral C10 upon laser vaporized graphite in He gas as studied by photoionization mass spectroscopy with 10.5 eV photons"J. Chem. Phys.. 118・12. 5390-5394 (2003)

Y. Kato 等人：“利用 10.5 eV 光子进行光电离质谱研究，在氦气中优先形成中性 C10” J. Chem. 118・12 (2003)。