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.
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 photodimerization 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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第11期2551-2557,共7页
Chemical Journal of Chinese Universities
基金
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)
中央高校基本科研业务费专项资金(批准号:13CX02045A)资助
