The Study of the Interaction Between Ca2+ and SDBS by Steady-State Fluorescence

doi:10.7517/j.issn.1674-0475.2005.03.203

Abstract

Abstract: The interaction between Ca²⁺ and SDBS was studied by steady-state fluorescence probe method in which pyrene was used as the fluorescence probe and the result was compared with that obtained by light transmission method. It was found that if added pyrene directly into Ca²⁺-SDBS system, the abrupt change of ratio I₁/I₃ was very close to the onset on which precipitate formed. When pyrene was added into the supernatant after centrifugation, the abrupt change of ratio I₁/I₃ corresponded to the point at which the precipitate began to redissolve. It was also found that the micropolarity sensed by pyrene probe decreased with the addition of salts. And the bivalent counterion Ca²⁺ influenced the micelle stronger than the monovalent counterion Na⁺.

Key words: steady-state fluorescence, critical micelle concentration, sodium dodecylbenzene sulfonate

CLC Number:

LIAO Lin, ZHANG Lu, ZHAO Sui, YU Jia-yong. The Study of the Interaction Between Ca²⁺ and SDBS by Steady-State Fluorescence[J]. Imaging Science and Photochemistry, 2005, 23(3): 203-208.

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The Study of the Interaction Between Ca²⁺ and SDBS by Steady-State Fluorescence

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