Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (4): 836-844.doi: 10.3866/PKU.WHXB201612153

• ARTICLE • Previous Articles     Next Articles

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

Hong-Lai LIU,Wan-Luo WANG,Shou-Hong XU*(),Hong-Lai LIU   

  • Received:2016-10-24 Published:2017-03-23
  • Contact: Shou-Hong XU E-mail:xushouhong@ecust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21276074);the National Natural Science Foundation of China(91334203);Fundamental Research Funds for the Central Universities, China

Abstract:

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.

Key words: LB technology, Azobenzene-containing glycolipid, Photoisomerization, Monomolecular film

MSC2000: 

  • O647