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.

研究了冷稀有气体基质中小碳簇的光诱导的分子过程。该项目的目的是确定线性和循环簇的特定化学反应通道，并使用知识来识别相关簇的未知UV/Vis吸收带。在这个项目中，我们发现用235 nm光子照射时，在6 k处的含碳NE矩阵的235 nm处的UV吸收带。同时，我们观察到，1959 cm-1和1199 cm-1的线性C6的IR带也减少了。我们的观察结果表明，我们得出的结论是，紫外线频带归因于线性C6。进一步研究基质分离的碳簇的紫外线和VIS带的选择性兴奋，从而发现了C2的新电子系统在浓缩相中发现了新的C2的电子系统，该系统通过荧光失活通过荧光依赖于基质依赖性的特征弛豫通道。

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)

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.

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, 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)。