非共价作用对金属卟啉光学稳定性的影响  

Effect of noncovalent interactions on the enhancement of the photostability of metalloporphyrin

作　　者：柴志华[1] 陈波[1] 王彦霞[1] 

机构地区：[1]华北科技学院环境工程学院,北京东燕郊101601

出　　处：《华北科技学院学报》2015年第6期109-113,共5页Journal of North China Institute of Science and Technology

基　　金：中央高校基本科研业务费资助项目(3142015008)

摘　　要：本文采用表面活性剂十六烷基三甲基溴化铵(CTAB)和嵌段共聚物聚乙二醇-b-聚4-乙烯基吡啶(PEG-b-P4VP)分别与5,10,15,20-四-(4-对磺酸基苯基)-锌卟啉(Zn TPPS)进行功能组装,形成以静电相互作用结合的CTAB/Zn TPPS复合体,以配位作用结合的PEG-bP4VP/Zn TPPS复合体,对复合体进行了紫外-可见光谱、荧光发射光谱、透射电子显微镜以及动态光散射表征。研究结果表明:静电作用和配位作用均能增强Zn TPPS的光学稳定性,但CTAB和PEG-b-P4VP浓度对其稳定性影响因素不同。在CTAB/Zn TPPS复合体中,随着CTAB浓度的降低,Zn TPPS的光学稳定性增加;而在PEG-b-P4VP/Zn TPPS复合体中,随着聚合物浓度的增强,Zn TPPS的光学稳定性逐渐增强。相比而言,配位作用在提高金属卟啉的光学稳定性方面发挥着更大的作用。In this paper, two types of complexes were formed by the noncovalent complexes between zinc por- phyrins and polymers. A series of electrostatic complexes were prepared from zinc tetrakis （4 - sulfonatophe- nyl） porphyrin （ZnTPPS） and cetyltrimethyl ammonium bromide （CTAB）. Meanwhile, the coordination com- plexes were fabricated from ZnTPPS and poly（ ethylene glycol） -block -poly（4 -vinylpyridine） （PEG -b - P4VP）. The structure and photochemical properties of the complexes were characterized by UV -visible spec- troscopy, fluorescence spectroscopy, transmission electron microscopy, and laser light scatting. The results showed that noncovalent interactions could enhance the stability of ZnTPPS. Notably, at the different polymer concentrations, ZnTPPS had different photostability. In the CTAB/ZnTPPS complex, the photostahility of ZnTPPS could be increased with lowering the concentration of CTAB. However, in the PEG- b -P4VP/ZnT- PPS complex, the photostability of ZnTPPS could be enhanced with increasing the concentration of PEG - b - P4VP. The axial coordination played a more important role in the photostability of metalloporphyrin in compar- ison with the electrostatic interaction.

关 键 词：金属卟啉 静电作用 配位作用 光学稳定性 

分 类 号：O631.24[理学—高分子化学]