Multi-dimensional wave-packet dynamics in potoinduced phase transition materials

马铃薯诱导相变材料中的多维波包动力学

基本信息

批准号：
18340079
负责人：
SUEMOTO Tohru
金额：
$ 10.33万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18340079/
关键词：
photoinduced phase transition wave packet Lissajous motion femtosecond time resolved luminescence halogen bridged platinum comples halogen bridged palladium complex F-center 発光白金錯体パラジウム錯体シトクロムc ダイナミクス

项目摘要

<Transition metal complexes> We investigated time resolved luminescence in Pt-Br at low temperature. We have found that the luminescence intensity increases anomalously at the low energy end of the wave packet (WP) oscillation. When the main part of the WP turns back to the high energy end, some part goes opposite direction. By comparing the results with a model calculation, we concluded that the WP splits on the top of the adiabatic potential curve connecting the self-trapped-exciton (STE) and the soliton pair state.We investigated the time resolved luminescence of Pd-Br complexes. We found that the STE state does not exist in this material, in spite of the charge-density-wave (CDW) ground state. The WP propagates to the state lower than the band gap without oscillation. This reflects the WP dynamics representing the phase transformation from Peierls insulator to Mott insulator.<F-centers in alkali halides> We observed the WP dynamics in F-centers. We found an asymmetric spectrum and unequal decay dynamics at high and low energy sides of the luminescence peak. This seems to originate from the large anharmonicity due to anticrossing between the 2s and 2p states. This is a good example of the WP dynamics on the potential curve with a crossing, which will useful for understanding the dynamics of photoinduced phase transitions.<Bio-materials> We observed the untrafast luminescence in aqueous solution of cytochrome c for the first time and assigned a luminescence peak to Q band. The result indicates that the non-radiative transfer of the electron to the d-orbital of Fe ion occurs within 300 fs. A long lifetime component is found and assigned to the state with a dessociated methionine group. These results clarify the relaxation dynamics of cytochrome c, which has not been known due to low luminescence intensity.

<过渡金属复合物>我们研究了在低温下PT-BR中的时间分辨发光。我们发现，发光强度在波数据包（WP）振荡的低能端处异常增加。当WP的主要部分转回高能端时，某个部分的方向相反。通过将结果与模型计算进行比较，我们得出的结论是，WP在连接自捕获 - 外激体（STE）和孤子对状态的绝热电势曲线顶部的拆分。我们发现，尽管电荷密度波（CDW）基态，但在该材料中不存在Ste状态。 WP向状态传播的状态低于带隙而没有振荡。这反映了代表从PEIERLS绝缘子到Mott绝缘体的相变的WP动力学。<碱卤化物中的F-Centers>我们观察到F-中心中的WP动力学。我们在发光峰的高能量边和低能侧发现了一个不对称的光谱和不平等的衰减动力学。这似乎源于由于2s和2p状态之间的抗骨骼引起的大型非谐调。这是通过交叉的电势曲线上的WP动力学的一个很好的例子，这将有助于理解光诱导的相变的动力学。<bio-Mathirials>我们首次观察了细胞色素C水溶液中的未经历的发光，并在第一次将发光分配给Q带中发光。结果表明，将电子向Fe离子的D轨道非辐射转移发生在300 fs之内。发现了长的寿命成分，并通过甲二氨氨酸组分配给状态。这些结果阐明了细胞色素C的弛豫动力学，由于发光强度低而尚未知道。