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氟化并五苯分子光谱和激发态的密度泛函理论研究
THE STUDY OF DENSITY FUNCTION THEORY ON THE MOLECULAR SPECTRA AND EXCITED STATE OF FLUORID PENTACENE
【摘要】 采用密度泛函理论(DFT)计算了氟化并五苯分子.在几何结构优化的基础上,对其进行频率分析得到了分子的红外光谱和拉曼光谱,并对谱线中的各峰值做了具体指认,同时得到了分子的HOMO-LUMO能隙2.02 eV,表明其是有机半导体材料.利用含时密度泛函理论(TDDFT)对其激发态计算,得到最低10个跃迁允许的单激发态,并分析了光谱的波长范围.
【Abstract】 Density function theory(DFT) was applied to the study of fluoride pentacene.Infrared and Raman spectra were discussed,and assignment of in-plane vibrational normal mode for fluorid pentacene was made by frequency analysis.Calculated HOMO-LUMO gap was found to be 2.02 eV,indicating that fluorid pentacene should be a semiconductor.The ten lowest allowable singlet excited states were obtained by TDDFT.Corresponding luminescence properties are discussed.
【关键词】 密度泛函理论(DFT);
氟化并五苯;
红外光谱;
拉曼光谱;
激发态;
【Key words】 density function theory(DFT); fluorid pentacene; infrared spectra; Raman spectra; the excited state;
【Key words】 density function theory(DFT); fluorid pentacene; infrared spectra; Raman spectra; the excited state;
【基金】 国家自然科学基金资助项目(20873009)
- 【文献出处】 北京师范大学学报(自然科学版) ,Journal of Beijing Normal University(Natural Science) , 编辑部邮箱 ,2009年01期
- 【分类号】O561.3
- 【被引频次】1
- 【下载频次】264