化学学报 ›› 2004, Vol. 62 ›› Issue (10): 963-968. 上一篇    下一篇

研究论文

靛蓝及其取代物的密度泛函理论研究

薛运生1, 贡雪东1, 肖鹤鸣1, 田禾2   

  1. 1. 南京理工大学化工学院, 南京, 210094;
    2. 华东理工大学精细化工研究所, 上海, 200237
  • 投稿日期:2003-08-14 修回日期:2004-01-30 发布日期:2014-02-17
  • 通讯作者: 肖鹤鸣,E-mail:xiao@mail.njust.edu.cn E-mail:xiao@mail.njust.edu.cn
  • 基金资助:
    国家自然科学基金(No.29836150)资助项目.

A Density Functional Theory Study of Indigo and Its Derivatives

XUE Yun-Sheng1, GONG Xue-Dong1, XIAO He-Ming1, TIAN He2   

  1. 1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094;
    2. Institute of Fine Chemical, East China University of Science and Technology, Shanghai 200237
  • Received:2003-08-14 Revised:2004-01-30 Published:2014-02-17

运用量子化学中密度泛函理论(DFT)方法,在B3LYP/6-31G*水平上对靛蓝及其芳环4,4'-, 5,5'-, 6,6'-, 7,7'-取代衍生物进行理论计算.探讨了F, Cl, Br, NO2, CH3O, CH3在不同位置的取代对分子的几何构型、电子结构和电子光谱的影响,获得与实验结果相一致的结论.还用含时密度泛函理论(TD-DFT)方法在相同水平计算其电子光谱.结果表明靛蓝及其芳环取代衍生物的最低激发单重态(S1)均源自HOMO-LUMO (π-π*)跃迁.

关键词: 靛蓝, 密度泛函理论(DFT), 含时密度泛函理论(TD-DFT), 取代基效应, 电子光谱

Indigo is one of the oldest known natural dyes. In the past decades, indigoids have been extensively investigated by experimental and theoretical methods. In theoretical study, semiempirical or Hartree-Fock MO methods were mostly used. Indigo and its 4,4'-, 5,5'-, 6,6'-, and 7,7'-disubstituted derivatives with F, Cl, Br, NO2, CH3O, and CH3 groups have been studied at the B3LYP/6-31G* level of density functional theory (DFT) in this paper. The substitution effects of the electron donating and electron accepting groups at various positions on the geometry structures, electronic structures, and the electronic spectra have been investigated, and quite good results were achieved compared with the experimental results. The electronic spectra have been calculated using the time dependent density functional theory (TD-DFT) approach. The calculated results showed that the first singlet excited state of indigoids resulted from the electron transition from the highest occupied MO (HOMO) to the lowest unoccupied MO (LUMO).

Key words: indigo, density functional theory(DFT), time-dependent density functional theory(TD-DFT), substitution effect, electronic spectra