The UV-Vis Spectra of Amphiphilic Metalloporphyrins in SDS Micelle

Zhao Xiaohong, Zhang Yunhong
(School of Science, Beijing Insistitute of Technology, Beijing 100081)

Abstract Taking advantage of the microenviroment sensitivity of the Soret band, UV-Vis spectra were used to study the dependence of location of the amphiphilic metalloporphyrins (P₁Zn and P₃Zn) in SDS micelle on the bulk pH value. The protonation of P₁Zn and P₃Zn in strong acidic condition suggests, Zn atom in P₁Zn was replaced by H⁺ in micelle, but Zn atom in P₃Zn was difficult to be replaced by H⁺. The solubilizing site and aggregating ability of P₁Zn and P₃Zn were analyzted in SDS micelle.
Key words Amphiphilic metalloporphyrin, Protonate, Aggregation, Sodium Dodecyl Sulfate micelle (SDS micelle)