Yoriko Saitoh, H. Watarai
Feb 1, 1997
Citations
0
Influential Citations
11
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
Interfacial ion-association adsorption of 5,10,15,20-tetrakis(4-sulfonatophenyl)-21H,23H-porphine (H2tpps4−) with hexadecyltrimethylammonium ion and 5,10,15,20-tetrakis(1-methyl-4-pyridinio)-21H,23H-porphine (H2tmpyp4+) with 1-hexadecanesulfonate was measured by means of a total internal reflection fluorometry at toluene/water systems. The adsorptivity of the porphyrins was negligibly small in the absence of the ionic surfactants, but it was increased by the addition of the surfactants in the 10−8—10−7 M concentration. The adsorptivity was governed by the positive or negative charge of the surface-active counter ion and its concentration, which determined the electrostatic potential of the interface. Further, it was found that zinc(II)-1,10-phenanthroline, a hydrophobic complex cation, remarkably enhanced the interfacial adsorption of [Zntpps]4− ion, but showed no positive effect on the adsorption of [Zntmpyp]4+ ion.