高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (2): 245.

• 研究论文 • 上一篇    下一篇

D-π-A分子H-聚集体的电子光谱

陈思光1, 姜月顺1, 卢然1, 杨文胜1, 杨继华1, 李铁津1, 杜祖亮2   

  1. 1. 吉林大学化学系, 长春 130023;
    2. 河南大学物理系, 开封 475001
  • 出版日期:2001-02-24 发布日期:2001-02-24
  • 通讯作者: 姜月顺(1942年出生),女,教授,主要从事光电功能材料的电子过程研究.
  • 基金资助:

    国家自然科学基金(批准号:69890226);河南省固体润滑和功能材料重点实验室资助

Spectral Studies of H-Aggregate of D-π-A Molecule

CHEN Si-Guang1, JIANG Yue-Shun1, LU Ran1, YANG Wen-Sheng1, YANG JI-Hua1, LI Tie-Jin1, DU Zu-Liang2   

  1. 1. Departmrnt of Chemistry, Jilin University, Changchun 130023, China;
    2. Department of Physics, Henan University, Kaifeng 475001, China
  • Online:2001-02-24 Published:2001-02-24

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摘要： 合成了具有强电子给体和强电子受体的D-π-A分子5-(4-N,N-二甲氨基苯乙烯基)-(1H,3H)-2,4,6-嘧啶三酮(AB1)和5-(4-N,N-双十八烷基氨基苯乙烯基)-(1H,3H)-2,4,6-嘧啶三酮(AB18),并对其电子光谱进行了研究.AB18在环己烷中聚集体的吸收光谱及AB1和AB18的表面光电压谱在450nm附近出现H-聚集体的谱带,比其在氯仿溶液中单体的ICT带蓝移了30nm左右.AB1和AB18固体及其高浓度的氯仿溶液分别在620nm和610nm附近出现来源于H-聚集体的激基缔合物的荧光,620nm带比单体红移3000cm-1左右.还探讨具有强电子给体和受体的D-π-A分子间π-π相互作用.

关键词: D-&pi, -A分子, H-聚集体, 激基缔合物, 荧光光谱, ICT激发态

Abstract: D-π-Amolecules bearing strong electron donor and acceptor, 5-(4-N,N-dimethyl amino-benzylidene)-(1H,3H)-2,4,6-pyrimidinetrione(AB1) and 5-(4-N,N-dioctadecylaminobenzylidene)-(1H,3H)-2,4,6-pyrimidinetrione(AB18) were synthesized and their spectral properties were investigated. For AB1 and AB18, their UV-visible absorption spectra in cyclohexane and surface photovoltage spectra show peaks at 450 nm due to the formation of H-aggregate, which underwent a blue-shift about 30 nm than that of monomer intramolecular charge transfer(ICT) band in chloroform. The fluorescence emission band of excimer of H-aggregate in solid and at a high concentration in chloroform solution occurs at 620 nm and near 610 nm, respectively. The band at 620 nm underwent a red-shift about 3000 cm-1 than that of monomer. In addition, intermolecularπ-π interactions of such D-π-Amolecules possesing strong electron donor and acceptor are discussed.

Key words: D-π-A molecules, H-aggregate, Excimer, Fluorescence emission spectra, ICT excited state

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