在Baeriswyl Bishop模型框架内,运用自洽变分数值计算方法,选取适当的开链参数,获得了准一维化合物[Pt(en)2][PtCl2(en)2](ClO4)4在开链情形下的基态解.在此基础上进一步研究了有限长[Pt(en)2][PtCl2(en)2](ClO4)4化合物链上的激子态.结果发现,基态晶格位形和电子能级结构均与周期边界条件下的解相当,端点无塌缩,能隙中不出现缺陷能级;激子的光吸收峰位于1 55eV附近,与最新实验数据吻合得很好. In the framework of Baeriswyl Bishop model, the quasi-one-dimensional compound [Pt (en) 2] [PtCl2 (en) 2] (ClO4) 4 chains in the finite length [Pt (en) 2] [PtCl2 (en) 2] (ClO4) 4 were also studied.It was found that the configurations of the ground state lattice states and The electron energy level structure is equivalent to the solution under the periodic boundary condition without end-point collapse, and no defect level appears in the energy gap. The light absorption peak of the exciton is located near 1 55eV, which is in good agreement with the latest experimental data.