BASE CATALYZED SOL-GEL METHOD STARTING FROM TMOS FOR
SYNTHESIS OF SILICA-PORPHYRIN NANOMATERIAL. FT-IR AND AFM
CHARACTERIZATIONS
Pages 77-80
Corina Enache, Eugenia Fagadar-Cosma, Cecilia Savii, Raluca Gavrila
Abstract
Semiconducting materials such as silicon have contributed greatly to modern society. The use of
photocurrent generating hybrid devices comprising organic molecules is now the state of art in this field.
An experiment regarding porphyrin immobilization into silica matrix by using in situ sol-gel technique
starting from TMOS is presented. The used para-hydroxyphenyl substituted porphyrin, namely:
5,10,15,20-tetrakis(4-hydroxyphenyl)-21H,23H-porphine, was isolated and purified by TLC, and column
chromatography, after performing an Adler condensation reaction. The functional porphyrin and the
silica-porphyrin hybrid material were monitored and characterized by 1H-NMR, FT-IR and UV-vis
spectrometry. High-resolution imaging using atomic force microscopy (AFM) have been applied to
directly observe the surface structures which are formed by immobilization of porphyrin on the surfaces.