HIGH-PERFORMANCE LIQUID-CHROMATOGRAPHY STATIONARY PHASES BASED ON PI-PI ELECTRON INTERACTION - AMINOPROPYL SILICA-GELS MODIFIED WITH METAL PHTHALOCYANINES

Aminopropyl silica gels were modified with two porphyrin derivatives a nd five phthalocyanine derivatives. The modified silica gels were eval uated for the usefulness as high-performance liquid chromatography sta tionary phases for the separation of pi-electron-rich polyaromatic hyd rocarbons (PAHs) such as naphthalene and phenanthrene. As a result of the modification, the aminopropyl silica gels acquired a function of p i-pi electron interaction with PAHs. In particular, the aminopropyl si lica gel modified with copper phthalocyanine (Cu-PCS) showed the stron gest pi-pi electron interaction with PAHs. It was the most suited as a stationary phase for the separations of PAHs among the modified silic a gels tested. The Cu-PCS column could be utilized for the separation of pi-electron-rich compounds including medicines, mutagens, and pollu tants.