标题：Mixed Quantum/Classical Method for Nonadiabatic Quantum Dynamics in Explicit Solvent Models: The pi pi*/n pi* Decay of Thymine in Water as a Test Case
作者：Cerezo, Javier; Liu, Yanli; Lin, Na; Zhao, Xian; Improta, Roberto; Santoro, Fabrizio
作者机构：[Cerezo, Javier; Liu, Yanli; Santoro, Fabrizio] CNR, ICCOM, Area Ric, SS Pisa, Via G Moruzzi 1, I-56124 Pisa, Italy.; [Cerezo, Javier] Univ Murcia, 更多
通讯作者地址：[Santoro, F]CNR, ICCOM, Area Ric, SS Pisa, Via G Moruzzi 1, I-56124 Pisa, Italy.
来源：JOURNAL OF CHEMICAL THEORY AND COMPUTATION
摘要：We present a novel mixed quantum classical dynamical method to include solvent effects on internal conversion (IC) processes. All the solute degrees of freedom are represented by a wavepacket moving according to nonadiabatic quantum dynamics, while the motion of an explicit solvent model is described by an ensemble of classical trajectories. The mutual coupling of the solute and solvent dynamics is included within a mean-field framework and the quantum and classical equations of motions are solved simultaneously. As a test case we apply our method to the ultrafast pi pi* -> n pi* decay of thymine in water. Solvent dynamical response modifies IC yield already on the 50 fs time scale. This effect is due to water librational motions that stabilize the most populated state. Pure static disorder, that is, the existence of different solvent configurations when photoexcitation takes place, also has a remarkable impact on the dynamics.