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In order to perform a transfer process of the porphyrin moiety across membrane media, an amphiphilic porphyrin 5,10,15-tri(4-hydroxyphenyl)-20-(4-hexadecyloxy-phenyl) porphyrin (P1) and its metalloporphyrin (P1Zn) were selected to be solubilized in cetyltrimethyl ammonium bromide (CTAB) micellar solutions. By taking advantage of the microenvironment sensitivity of their Soret band, UV-Vis spectra were used to study the dependence of location of the porphyrins in CTAB micellar media on the bulk pH value or the salt concentration of bulk solutions. The red shift of the Soret band, the decrease of its absorbance and the increase of the full width at half-maximum (FWHM) of P1Zn and P1 with pH titration process from neutral to weak basicity were attributed to the transfer process of the porphyrin moiety from the inner core to the outer surface of the micelles. In the pH sensitive area of the Soret band of P1Zn and P1, the blue shift of the Soret band, the increase of its absorbance and decrease of FWHM were
In order to perform a transfer process of the porphyrin moiety across membrane media, an amphiphilic porphyrin 5,10,15-tri (4-hydroxyphenyl) -20- (4-hexadecyloxy-phenyl) porphyrin (P1) and its metalloporphyrin were selected to be solubilized in cetyltrimethyl ammonium bromide (CTAB) micellar solutions. By taking advantage of the microenvironment sensitivity of their Soret band, UV-Vis spectra were used to study the dependence of location of the porphyrins in CTAB micellar media on the bulk pH The red shift of the Soret band, the decrease of its absorbance and the increase of the full width at half-maximum (FWHM) of P1Zn and P1 with pH titration process from neutral to weak basicity were attributed to the transfer process of the porphyrin moiety from the inner core to the outer surface of the micelles. In the pH sensitive area of the Soret band of P1Zn and P1, the blue shift of the Soret band, the increase of its absorbance and decr ease of FWHM were