UV-visible and fluorescence spectral study on a pH controlled transfer process of an amphiphilic porphyrin in nonionic micelle.
5,15-di(4-hydroxyphenyl)-10,20-di(hexadecyloxyphenyl) porphyrin P was solubilized in nonionic polyoxyethylene(9.5) octylphenol (Triton X-100 or TX-100) micelle solutions. By means of analyzing the UV-visible and fluorescence spectra of the synthesized amphiphilic porphyrin P in different solvent environments, and the relationship between the solubilizing location of the porphyrins in TX-100 micelle and the microenvironment polarity, P is shown to involve in a transfer process for the porphyrin moiety from inner to the outer surface of TX-100 micelle as the pH is increased. The kinetic study of porphyrin incorporate with Cu(II) shows that metalation rate of porphyrin increases with the pH increasing, indicating that metalation rate could be controlled by changing pH.
Guo
Lin
L
Institute of Mesocopic Solid State Chemistry and National Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, People's Republic of China. linguo@jlonline.com
Liang
Ying-qiu
YQ
D003902:Detergents / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008823:Micelles; D008956:Models, Chemical; D017830:Octoxynol / Q000494:pharmacology; D011166:Porphyrins / Q000032:analysis* / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods*; D014466:Ultraviolet Rays
C475671:5,15-bis(4-hydroxyphenyl)-10,20-bis(hexadecyloxyphenyl)porphyrin P; D003902:Detergents; D008823:Micelles; D011166:Porphyrins; D017830:Octoxynol