Acta Phys. -Chim. Sin. ›› 1999, Vol. 15 ›› Issue (05): 471-475.doi: 10.3866/PKU.WHXB19990517

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Influence of the Interlayer Interactions on Aggregates in Organic Molecular Films

Wang Wen-Jun, Xu Jian-Hua, Lu Xing-Ze, Han Kui, Wang Gong-Ming, Wang Wen-Cheng, Cai Zhi-Gang, Yang Pei-Qing, Zhou Jian-Ying   

  1. State Key Joint Laboratory for Materials Modefication by Laser,Ion and Electron Beams,Department of Physics,Fudan Unviersity,Shanghai 200433|State Key Laboratory of Ultrafast Laser Spectroscopy,Zhongshan University,Guangzhou 510275
  • Received:1998-07-27 Revised:1998-10-05 Published:1999-05-15
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Abstract:

Influence of the interlayer interactions on aggregates in Y-type Langmuir-Blodgett multilayers was investigated by using steady-state and time-resolved fluorescence techniques. As the interlayer interactions was screened by arachidic acid layers, intralayer interaction of hemicyanine molecules caused formation of H-aggregates and a blue shift of the fluorescence band in interleaving hemicyanine/arachidic acid multilayers. In pure Y-type hemicyanine multilayers, however, the molecules mainly formed J-aggregates leading to a significant red shift of fluorescence band and a larger scale of aggregates due to the stronger interlayer interactions.

Key words: Langmuir-Blodgett(LB) multilayers, Aggregate, Time-resolved fluorescence