高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (12): 2295.

• 研究论文 • 上一篇    下一篇

三-(2-苯基吡啶)-铱及其衍生物电子结构、电子光谱及取代基效应的密度泛函理论研究

刘晓冬1,2, 任爱民1, 封继康1,2, 杨丽1, 杨兵3, 孙家锺1   

  1. 1. 吉林大学理论化学研究所理论化学计算国家重点实验室, 长春130023;
    2. 吉林大学化学学院, 长春130023;
    3. 吉林大学理论化学研究所超分子结构与材料教育部重点实验室, 长春130023
  • 收稿日期:2004-03-25 出版日期:2004-12-24 发布日期:2004-12-24
  • 基金资助:

    国家重点基础研究发展规划项目(批准号:2002CB613406);国家自然科学基金(批准号:90101026)资助

Theoretical Studies of Electronic Structures, Electronic Spectra and Substituent Effect in Cyclometalated Phenylpyridine Ir(Ⅲ) Complex and Its Derivatives Using Density Functional Theory

LIU Xiao-Dong1,2, REN Ai-Min1, FENG Ji-Kang1,2, YANG Li1, YANG Bing3, SUN Chia-Chung1   

  1. 1. State Key Laboratory of Theoretical and Computational Chemistry, Instutute of Theoretical Chemistry, Jilin University, Changchun 130023, China;
    2. The college of Chemistry, Jilin University, Changchun 130023, China;
    3. Key Laboratory for Supramolecular Structure and Material of Ministry of Education, Jilin University, Changchun 130023, China
  • Received:2004-03-25 Online:2004-12-24 Published:2004-12-24

摘要: 采用密度泛函理论(DFT)B3LYP/LanL2dz方法,对一类重要的磷光材料三-(2-苯基吡啶)-铱[Ir(ppy)3]及其衍生物的电子结构与电子光谱进行了研究,讨论了取代基对配合物的能级和LUMO-HOMO能隙的影响,发现吸电子基(-CN)使能级降低,HOMO-LUMO之间能隙减小,而推电子基(-OCH3)使能级升高,HOMO-LUMO之间能隙变化不大.

关键词: Ir(ppy)3, 基态构型, 分子轨道分析, 能级调控, 电子光谱

Abstract: The ground state and electronic spectra in the Ir(Ⅲ) complex Ir(ppy)3[where ppy=2-phenylpyridine], an important phosphorescent material, and its derivatives were studied by using density functional theory(DFT) B3LYP/LanL2dz in programme Gaussian 98. The effects of substituted groups on energies and gaps of HOMO-LUMO were discussed. It is found that electron-withdrawing substituent(-CN) makes both orbital energies and gaps of HOMO-LUMO decrease, whereas electron-releasing substituent(-OCH3) makes orbital energies increase and gaps of HOMO-LUMO relatively unvaried.

Key words: Ir(ppy)3, Ground state configuration, MO analysis, Energies control, Electronic spectrum

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