系列双亲卟啉在SDS胶束中的光谱特性研究

Spectral Characteristics of the Amphiphilic Porphyrins in SDS Micellar Microenvironments

用敏感于微环境变化的紫外-可见吸收光谱和荧光光谱,研究了系列双亲卟啉(对四羟基苯基卟啉P0及其烷氧基衍生物P1,P2)在四氢呋喃和SDS胶束体系中的定位性质和聚集行为,考察了不同微环境下,卟啉分子中不同侧链取代基对紫外-可见吸收光谱和荧光光谱的影响.研究结果表明,系列双亲卟啉在THF溶液中以单体形式存在,其侧链取代基不影响卟啉的电子态;在SDS胶束溶液中,紫外-可见吸收光谱随着双亲卟啉侧链取代基的增加,吸光度减小,半峰宽增加,荧光光谱发生了荧光猝灭,表明系列双亲卟啉中侧链取代基不同,其聚集状态不同,从而导致不同的增溶位置变化.

Three sorts of amphiphilic porphyrins （4-hydroxyphenyl porphyrins P0 and its alkoxy derivates P1,P2）were solublized in THF solutions and SDS micellar solutions. The position-made and aggregation behavior were studied by means of UV-VIS and fluorescence spectra influenced by different side-chain substituents in varieties of microenvironments. The results indicates that amphiphilic porphyrins exists as monomers in THF solutions, and the effects of the side-chain substituents on the electronic states of porphyrins are negligible. The UV-VIS spectras absorbance decreases, FWHH increases, fluorescence quenching occurs in fluorescence spectra as amphiphilic porphyrins side-chain substituents increase. It demonstrates that amphiphilic porphyrin s side-chain substituents vary, its aggregations vary, leading to varied solubilization position.