Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (11): 2551.doi: 10.7503/cjcu20130582

• Physical Chemistry • Previous Articles     Next Articles

Photodimerization of Cinnamoyl Moiety in the Hydrophobic Chains of Gemini Surfactant

FAN Hai-Ming1,2, ZHU Xiao-Ming2, YAN Yun2, HUANG Jian-Bin1,2, KANG Wan-Li1   

  1. 1. College of Petroleum Engineering, China University of Petroleum(East China), Qingdao 266580, China;
    2. Beijing National Laboratory for Molecular Sciences(BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry, Peking University, Beijing 100871, China
  • Received:2013-06-24 Online:2013-11-10 Published:2013-09-13

Abstract:

The photochemistry processes and products of Gemini surfactant sodium N,N'-di(4-n-butyloxy cinnamoyl)-L-cystine(SDBCC) were investigated by UV absorption spectra, IR spectra and mass spectrum. The influences of SDBCC concentration on the photochemical reaction products distribution and photodimerization yield were analyzed. The photodimerization takes place more favorably for the photochemistry processes of cinnamoyl moiety in the hydrophobic chains of SDBCC at different concentrations and the photodimerizaiton product all formed by intramolecular reaction. However, the variation trends of cinnamoyl moiety photodime-rization yield with SDBCC concentrations are different. The dimerization yield increases with concentration before aggregates formation, whereas the dimerization yield decreases with concentration after aggregates formation. The effects of micelle and vesicle formation on the photodimerization of cinnamoyl moieties in SDBCC hydrophobic chains were further analyzed by combination of photochemistry processes, topochemical stipulated condition and aggregate structures.

Key words: Cinnamoyl Moiety, Photodimerization, Topochemical condition, Gemini surfactant, Micelle, Vesicle

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