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Citation: LIU Dan-Yang, WANG Wan-Luo, XU Shou-Hong, LIU Hong-Lai. Photo-Responsivity of Azobenzene-Containing Glycolipid within Liquid-Gas Interface[J]. Acta Physico-Chimica Sinica, ;2017, 33(4): 836-844. doi: 10.3866/PKU.WHXB201612153 shu

Photo-Responsivity of Azobenzene-Containing Glycolipid within Liquid-Gas Interface

Key Laboratory for Advanced Materials & Institute of Fine Chemicals of the Education Ministry of China, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China

Received Date: 24 October 2016
Revised Date: 15 December 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (21276074, 91334203) and Fundamental Research Funds for the Central Universities, China.

Azobenzene-containing glycolipid, Gal-azo-Cn, was synthesized and its photoisomerization behavior within the liquid-gas interfaces was investigated by Langmuir Blodgett (LB) filmmeasurements and atomic force microscopy. The results showed that Gal-azo-Cn could undergo trans-cis and cis-trans isomerization in both pure glycolipid and phospholipid-mixed films. UV-light induced isomerization increased the surface pressure. However, the membrane pressure within the liquid-gas interface could hinder the trans-cis isomerization. The high membrane pressure prevented the increase of surface pressure, weakening the trans-cis isomerization. In contrast, the cis-trans isomerization sped up in the dark. Compared with the isomerization behavior of pure glycolipid, the interaction between phospholipid and glycolipid could promote the trans-cis isomerization within the liquid-gas interface. In themixed system, the increase in phospholipid containing unsaturated carbon chains increased the fluidity of the membrane but decreased its stability, which weaken the promotion effect of isomerization.
- LB technology,
- Azobenzene-containing glycolipid,
- Photoisomerization,
- Monomolecular film
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