高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (11): 2551.doi: 10.7503/cjcu20130582

• 物理化学 • 上一篇    下一篇

Gemini型表面活性剂疏水链中肉桂酸基团的光致二聚反应

范海明1,2, 祝小茗2, 阎云2, 黄建滨1,2, 康万利1   

  1. 1. 中国石油大学(华东)石油工程学院, 青岛 266580;
    2. 北京分子科学国家实验室, 分子动态与稳态结构国家重点实验室, 北京大学化学与分子工程学院, 北京 100871
  • 收稿日期:2013-06-24 出版日期:2013-11-10 发布日期:2013-09-13
  • 作者简介:范海明,男,博士,副教授,主要从事胶体与界面化学和油田化学研究,E-mail:HaimingFan@gmail.com;黄建滨,男,博士,教授,主要从事胶体与界面化学研究,E-mail:JBHuang@pku.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:21273013,21273006,20903005,51104169)、山东省自然科学基金(批准号:ZR2010EZ006,ZR2010BQ003)、长江学者和创新团队发展计划(批准号:IRT1294)和中央高校基本科研业务费专项资金(批准号:13CX02045A)资助.

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

摘要:

采用紫外光谱、 红外光谱和质谱研究了Gemini型表面活性剂N,N'-二对丁氧基肉桂酰胺基胱氨酸钠(SDBCC)溶液的光化学反应过程和产物, 分析了SDBCC浓度对分子疏水链中肉桂酸基团光化学反应产物分布和光致二聚产率的影响. 结果表明, 在不同浓度下, SDBCC分子疏水链中的肉桂酸基团的光化学反应过程均以光致二聚反应为主, 且为分子内光致二聚产物. 但聚集体形成前后在光照过程中肉桂酸基团的光致二聚反应产率随SDBCC浓度的变化趋势不同, 聚集体形成前光致二聚反应产率随浓度的增加而增大, 聚集体形成后光致二聚反应产率随浓度的增大而减小. 综合光化学反应过程、 拓扑条件和聚集体结构进一步分析了胶束和囊泡的存在对SDBCC分子疏水链中肉桂酸基团光致二聚反应的影响.

关键词: 肉桂酸基团, 光致二聚反应, 拓扑条件, Gemini型表面活性剂, 胶束, 囊泡

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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