Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (12): 2500.

• Articles • Previous Articles     Next Articles

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

ZHANG Li-Yan, LI Yan, ZHAO Li-Zhi, LIU Xue, WANG Xin, MA Ru-Jiang, AN Ying-Li, SHI Lin-Qi*   

  1. Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin 300071, China
  • Received:2010-02-03 Revised:2010-03-31 Online:2010-12-10 Published:2010-12-06
  • Contact: SHI Lin-Qi E-mail:shilinqi@nankai.edu.cn
  • About author:史林启, 男, 博士, 教授, 博士生导师, 主要从事功能高分子方面的研究.
  • Supported by:

    National Natural Science Foundation of China;National Natural Science Foundation of China

Abstract: TX-100/n-hexanol/water/cyclohexane inverse microemulsions have been used to entrap tetrakis(4-sulfonatophenyl)porphyrin (TPPS). The aggregation behaviors of TPPS in the inner phase of nonionic W/O inverse have been investigated on changing pH, size of the microemulsions water pool and the concentration of porphyrin. The apparent pKa of TPPS in microemulsions have been found to be much lower than that in open aqueous solution, and exhibit a decrease on decreasing the water pool dimension. Deprotonized TPPS was prevalently presented when pH > pKa. While J-aggregates and protonized TPPS are the main species existed when pH < pKa, and more protonized TPPS self-assemble into J-aggregates on increasing the concentration of TPPS. At fixed pH, the deprotonized TPPS tend to become protonized and self-assemble into J-aggregates on increasing the inner water pool dimension.

Key words: TPPS, soft microconfinement, nonionic surfactant, inverse microemulsions

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