四-(4-苯基磺酸基)卟啉在反相微乳内相中的聚集行为  

Aggregation Behavior of Tetrakis(4-sulfonatophenyl)porphyrin in the Inner Water Pool of Inverse Microemulsions

作　　者：张立岩[1] 李岩[1] 赵莉芝[1] 刘学[1] 王鑫[1] 马如江[1] 安英丽[1] 史林启[1] 

机构地区：[1]南开大学高分子化学研究所,功能高分子材料教育部重点实验室,天津300071

出　　处：《高等学校化学学报》2010年第12期2500-2505,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20774051,50625310)资助

摘　　要：研究了四-(4-苯基磺酸基)卟啉(TPPS)在由聚乙二醇辛基苯基醚(TX-100)构筑的反相微乳液内相中的聚集行为.当改变反相微乳水相液滴的pH值、粒径及TPPS的浓度时,反相乳液内相中TPPS的表观pKa明显小于在水溶液中的pKa(4.9),并且TPPS的表观pKa随着水相液滴粒径w0值[w0=n(H2O)/n(TX-100)]的减小而降低;当水相液滴的pH>pKa时,TPPS以去质子化单体H2TPPS4-形式存在,而当pH<pKa时,TPPS以质子化单体H4TPPS2-和J-聚集体两种形式存在,TPPS浓度的增大促进了H4TPPS2-向J-聚集体的转变;在pH值不变的条件下,随着水相液滴粒径的增大,TPPS的存在状态由H2TPPS4-向H4TPPS2-转变,并形成J-聚集体.TX-100/n-hexanol/water/cyclohexane inverse microemulsions were used to entrap tetrakis-（4-sulfonatophenyl）porphyrin（TPPS）.The aggregation behavior of TPPS in the inner phase of nonionic W/O inverse phase was investigated on changing pH,the size of the microemulsions[w0=n（H2O）/n（TX-100）] and the concentration of porphyrin.The apparent pKa of TPPS in a microemulsion was found to be much lower than that in an open aqueous solution,and exhibited a decrease on decreasing the w0 value.Deprotonized TPPS was prevalently presented when pHpKa.While the main species J-aggregates and protonized TPPS existed when pHpKa,and more protonized TPPS self-assembled into J-aggregates on increasing the concentration of TPPS.At fixed pH,the deprotonized TPPS tended to become protonized and self-assembled into J-aggregates on increa-sing the inner water pool dimension（w0 value）.

关 键 词：四-(4-苯基磺酸基)卟啉 非离子型表面活性剂 反相微乳液 聚集行为 

分 类 号：O631[理学—高分子化学]