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Reference type: Journal
Authors: Ciuffi KJ, Sacco HC, Valim JB, Manso CMCP, Serra OA, Nascimento OR, Vidoto EA, Iamamoto Y
Article Title: Polymeric organic-inorganic hybrid material containing iron(III) porphyrin using sol-gel process.
Publication date: 1999
Journal: Journal of Non-Crystalline Solids
Volume: 247
Issue: (1-3)
Page numbers: 146-152.
DOI: 10.1016/S0022-3093(99)00053-8

Abstract: Here we describe the preparation of iron(II) porphyrinosilica in a simple one-pot reaction, where the -SO2Cl groups present in the phenyl rings of FeTDCSPP+ react with 3-aminopropyltriethoxysilane and tetraethoxysilane in the presence of a nitrogenous base, leading to iron(III) porphyrinosilica. In this same procedure, molecular cavities containing regularly spaced functional groups are created through the molecular imprinting technique, in which the nitrogenous base coordinated to the iron(III) porphyrin serves as a template. The removal of such template in a Soxhlet extractor leads to a cavity with the same shape and size as the nitrogenous base, enabling the construction of shape-selective catalysts mimicking cytochrome P-450. Five different imprinting molecules have been used: imidazole, 1- methylimidazole, 2-methylbenzimidazole, 4-phenylimidazole and miconazole and ultra-violet/visible absorption spectroscopy, thermogravimetric analysis and electron paramagnetic resonance carried out. (C) 1999 Elsevier Science B.V. All rights reserved

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