基于从头计算方法和半经验势分子动力学,通过计算尿嘧啶分子及其水合尿嘧啶分子运动轨迹的速度自关联函数的傅立叶变换,给出了这些分子的振动频率.通过求解Hessian矩阵,鉴别出这些分子每一个振动频率的振动模式.对孤立的尿嘧啶分子,计算结果能够和实验数据符合.对水合尿嘧啶分子中,尿嘧啶分子的结构和振动频率的改变做了讨论.
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