Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1485277 | Journal of Non-Crystalline Solids | 2007 | 7 Pages |
Abstract
Hybrid materials consisting of a substituted porphyrinic macrocycle covalently bonded to a porous silica matrix have been prepared. The organic macrocycle 5,10,15,20-tetra-(p-hydroxy)phenylporphyrin, H2T(p-OH)PP, has been covalently bonded to silica gel porous networks, obtained by sol-gel reactions, by means of 3-isocyanatopropyl-triethoxysilane (IPTES), whose molecules act as bridges between the silica precursor tetraethoxysilane (TEOS) and the porphyrinic H2T(p-OH)PP macrocycles. Electronic absorption spectra show Soret and Q bands characteristic of trapped porphyrins inside the silica networks. Infrared spectroscopy monitoring has been employed to demonstrate the formation of covalent bonds between some substituents of the porphyrin molecules and the isocyanato group of IPTES.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
V. De la Luz, M.A. GarcÃa-Sánchez, A. Campero,