物理化学学报 >> 2000, Vol. 16 >> Issue (01): 49-54.doi: 10.3866/PKU.WHXB20000110

研究论文 上一篇    下一篇

罗丹明标记的磷脂分子聚集态的光谱与AFM研究

柳汀汀, 于安池, 罗国斌, 赵新生, 应立明, 黄岩谊, 黄春辉   

  1. 北京大学分子动态与稳态结构国家重点实验室和物理化学研究所，北京 100871|北京大学稀土材料化学与应用国家重点实验室，北京 100871
  • 收稿日期:1999-03-29 修回日期:1999-06-23 发布日期:2000-01-15
  • 通讯作者: 赵新生

Aggregates in Rhodamine-labeled Phospholipid Films Probed by Spectroscopy and Atomic Force Microscopy

Liu Ting-Ting, Yu An-Chi, Luo Guo-Bin, Zhao Xin-Sheng, Ying Li-Ming, Huang Yan-Yi, Huang Chun-Hui   

  1. State Key Laboratory of Molecular Dynamic and Stable Structures,and Institute of Physical Chemistry,Peking University,Beijing 100871;State Key Laboratory of Rare Earth Materials Chemistry and Applications,Peking University,Beijing 100871
  • Received:1999-03-29 Revised:1999-06-23 Published:2000-01-15
  • Contact: Zhao Xin-Sheng

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摘要：

在不同表面压的ＬＢ膜上，应用光谱学和原子力显微镜学研究了由罗丹明标记的磷脂分子形成的多种聚集态．这些分子聚集态使光谱的峰值位移，谱带加宽．ＡＦＭ的形貌图进一步说明了膦脂单分子膜的不均一性．根据激子理论，以４５°取向角存在的罗丹明染料聚集体更符合π－Ａ曲线．

关键词: 聚集态, 激子, AFM, 磷脂, LB膜, 光谱学

Abstract:

Molecular aggregates of rhodamine labeled phospholipid T1391 on LB films at different surface pressures have been investigated by optical spectroscopy and atomic force microscopy (AFM). Different types of molecular aggregates which show peak shifting and band broadening in the spectra were confirmed by the morphological AFM image. The rhodamine chromophores in the aggregates were suggested to orient at an angle of about 45 degree on the mica surface based on exciton theory and surface pleasure-area isotherm.

Key words: Aggregate, Exciton, AFM, Phospholipid, LB film, Spectroscopy