Study of the solvation Dynamics of Clusters using Femutosecond Spectroscopy

飞秒光谱研究团簇溶剂化动力学

• 批准号: 11304042
• 负责人: FUE Kiyokazu
• 金额: $ 24.76万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11304042/
• 关键词: Alka limetal Atom; Alkaline-earth Metal Ion; Hydrated electron; ammonia clusters; Photoelectron spectroscopy; Femtosecond Laser Spectroscopy; Electrospray Ionization Mass Spectroscopy; シトクロムc; アルカリ土類金属原子イオン; 水和クラスター; アンモニアクラスター; 溶媒和過程; レーザー光電子

(1) Electronic spectra of Li(H2O)a have been measured using photodissociation spectroscopy. the spectra for larger clusters have been found to converge to the absorption spectra balk hydrated electron. We have also measured the lifetime of the 1:1 complex with pump-prove technique using a femtosecon laser and found an extremely fast internal conversion process.(2) Photoelectron spectra of Nam(NH3)[1 clusters have been investigated to examine the solvation of metal aggregates in small ammonia clusters. We have found that N% starts to dissolves even in clusters with three NH3 molecules.(3) Electronic spectra and photodissociation process of Mg(NH3)n have been investigated in order to explore the size dependence of the oxidation mode of Mg*. We have found the redox reactions of Mg+-water clusters for n<3 and the oxidation of Mg* to produce Mg2t for larger clusters. The two-photon ionization process of Mg(NH3)n has also been investigated using the femtosecond laser and obtain new results on the stability of Mg2+ in clusters.(4) A mass spectrometer with electrospray ionization source has been newly constructed to study the spectroscopy of nonvolatile ions. We have investigated the photodissociation process of hemin-(dimethyl surfoxide)n clusters and clarified the mechanism of b-cleavage reaction. We have also examined the photoionization process of the gas-phase cytochrome cions.

(1) 使用光解离光谱测量了 Li(H2O)a 的电子光谱。已发现较大团簇的光谱收敛于水合电子的吸收光谱。我们还使用飞秒激光通过泵浦验证技术测量了 1:1 配合物的寿命，并发现了极快的内部转换过程。(2) 研究了 Nam(NH3)[1 团簇的光电子能谱，以检查溶剂化作用小氨簇中的金属聚集体。我们发现即使在具有三个NH3分子的簇中N%也开始溶解。(3)研究了Mg(NH3)n的电子能谱和光解过程以探索Mg*氧化模式的尺寸依赖性。我们发现 n<3 时 Mg+-水簇的氧化还原反应以及较大簇时 Mg* 的氧化产生 Mg2t。利用飞秒激光研究了Mg(NH3)n的双光子电离过程，并获得了团簇中Mg2+稳定性的新结果。(4)新建了带有电喷雾电离源的质谱仪来研究光谱学。的非挥发性离子。我们研究了氯高铁血红素-(二甲基亚砜)n簇的光解离过程，并阐明了b-裂解反应的机理。我们还研究了气相细胞色素离子的光电离过程。

项目成果

富宅喜代一: "Near Threshold Photoionization of Germanium Clusters in the 248-144mm Region: Ionization Potentials for Gen"Europ.Phys.J.D.. D9. 309-311 (1999)

Kiyoichi Tomiya：“248-144mm 区域中锗团簇的近阈值光电离：Gen 的电离势”Europ.Phys.J.D. D9。

吉田真治: "Photoionization and photodissociation studies of semiconductor clusters"Trans.Mat.Res.Jpn,. 25. 995-998 (2000)

吉田真司：“半导体团簇的光离子化和光解离研究”Trans.Mat.Res.Jpn，25. 995-998 (2000)

野々瀬真司: "Electronic Spectra and Structures of Solvated NH_4 Radicals, NH_4(NH_3)_n(n=1-8)"J. Phys. Chem.. (印刷中).

Shinji Nonose：“溶剂化 NH_4 自由基的电子光谱和结构，NH_4(NH_3)_n(n=1-8)”J. Phys.（印刷中）。

S. Nonose, T. Taguchi, K. Mizuma and K. Fuke: "Electronic Sp Solvated NH, Radicals, NH, (NH3)n (n = I - 6)"Europ. Phys. J.. D9. 309-311 (1999)

S. Nonose、T. Taguchi、K. Mizuma 和 K. Fuke：“电子 Sp 溶剂化 NH，自由基，NH，(NH3)n (n = I - 6)”Europ。

高須良三: "Solvation Process of Na_m in Small Ammonia Clusters : Photoelectron Spectroscopy of Na_m-(NH_3)_n (m≦3)"J.El.Sepctros.Relat.Phenom.. 106. 127-140 (2000)

Ryozo Takasu：“Na_m 在小氨团簇中的溶剂化过程：Na_m-(NH_3)_n (m≤3) 的光电子能谱” J.El.Sepctros.Relat.Phenom.. 106. 127-140 (2000)