The Effect of Salt and Organic Solvents on the Interaction of Thionin-Sodium Dodecyl Sulfate System

Thionin-Sodium Dodecyl Sulfate계의 상호작용에 있어서 염 및 유기용매의 첨가효과에 관한 연구

  • Kim, Sung-Hyun (Dept. of Chem., College of Natural science, Chosun Univ.) ;
  • Song, Ki-Dong (Dept. of Chem., College of Natural science, Chosun Univ.)
  • 김성현 (조선대학교 자연과학대학 화학과) ;
  • 송기동 (조선대학교 자연과학대학 화학과)
  • Received : 1994.02.24
  • Accepted : 1994.07.18
  • Published : 1994.10.01


The interaction between the cationic dye, thionin(Th) and the anionic surfactant, sodium dodecyl sulfate (SDS) has been investigated by absorption spectra. As the temperature of surfactant solution was increased in premicellar range(S/D=10, 80, and 160) which was much lower than the critical micelle concentration(CMC), the increment or decrement of the molar extinction coeffecient ratio appeared. It was found that the most stable temperature range of the oligomer aggregate in Th-SDS system at S/D=160 was below $60^{\circ}C$. With increasing the concentration of inorganic salt and organic solvents in Th-SDS system, ${\alpha}$-band was increased, but ${\gamma}$=band or J-band was decreased. The orders of ${\alpha}$-band increasing power were $Cl^-$>$ClO{_4}{^-}$>$SO{_4}{^{2-}}$>$NO{_3}{^-}$ and 2-propanol>ethanol>methanol>ethylene glycol.