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Study of the solvation Dynamics of Clusters using Femutosecond Spectroscopy

飞秒光谱研究团簇溶剂化动力学

基本信息

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

项目摘要

(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)用光离解谱测量了Li（H_2O）_3的电子光谱。我们还用飞秒激光泵浦验证技术测量了1：1复合物的寿命，发现了一个非常快的内转换过程。(2)本文研究了Nam（NH_3）[1]团簇的光电子能谱，以考察金属聚集体在小团簇中的溶剂化作用。我们已经发现，N%开始溶解，甚至在集群与三个NH3分子。(3)研究了Mg（NH3）n的电子光谱和光解过程，探讨了Mg* 氧化模式的尺寸依赖性。我们已经发现了Mg+-水簇合物的氧化还原反应，对于n<3和Mg* 的氧化，以产生Mg 2 t较大的集群。利用飞秒激光对Mg（NH3）n的双光子电离过程进行了研究，获得了Mg ~（2+）团簇稳定性的新结果。(4)本文报道了一台新研制的电喷雾电离质谱仪，用于非挥发性离子的光谱研究。研究了氯化血红素-（二甲基亚砜）n团簇的光解过程，阐明了b-断裂反应的机理。我们还研究了气相细胞色素离子的光电离过程。