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

&lt；过渡金属络合物&gt；我们研究了铂-溴的低温时间分辨发光。我们发现，在波包(WP)振荡的低能端，发光强度反常地增加。当WP的主要部分转向高能端时，一些部分会朝着相反的方向移动。通过与模型计算结果的比较，我们认为WP在连接自陷态激子(STE)和孤子对状态的绝热势能曲线的顶端发生分裂。我们发现，尽管该材料处于电荷密度波(CDW)基态，但并不存在STE态。WP无振荡地传播到低于带隙的状态。这反映了从Peierls绝缘体到Mott绝缘体的WP动力学。我们观察到了F心的WP动力学。我们发现在发光峰的高、低能侧存在不对称的光谱和不同的衰减动力学。这似乎源于2s态和2p态之间的反腐蚀造成的大的非谐性。这是一个具有交叉点的电势曲线上WP动力学的很好的例子，这将有助于理解光诱导相变的动力学。我们首次观察到细胞色素c在水溶液中的超快发光，并在Q带指定了一个发光峰。结果表明，电子向Fe离子d轨道的非辐射转移发生在300fs内。发现了长寿命组分，并将其分配给具有解离蛋氨酸基团的状态。这些结果阐明了细胞色素c的驰豫动力学，由于发光强度较低，该动力学尚不清楚。

<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.