Ironporphyrins trapped sol–gel glasses: a chemometric approach

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• 作者：Sacco ; Hé ; rica C. ; Ciuffi ; Katia J. ; Biazzotto ; Juliana C. ; Mello ; Cesar ; de Oliveira ; Daniela C. ; et. al.
• 关键词：S310 ; T350 ; E230 ; S100
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2001
• 期刊代码：50_00223093
• 类别：ms
• 出版时间：May, 2001
• 卷：284
• 期：1-3
• 页码：174-182
• 文件大小：312 K

摘要

The optimised conditions for preparation of ironporphyrin (FeP)-template trapped silica obtained by the sol–gel process are analysed by fractional factorial design. The FeP iron 5,10,15,20-tetrakis(pentafluorophenyl)-porphyrin (FeTFPPCl), iron 5,10,15,20-tetrakis(2,6-dichlorophenyl-3-sulphonatophenyl)-porphyrin (FeTDCSPP(Na)₄Cl), iron 5,10,15,20-tetrakis-p-carboxyphenylporphyrin (FeTCPP(Na)₄Cl) and iron 5,10,15,20-tetrakis-p-methylpyridilporphyrin (FeTMPyP(Cl)₅) were used. Pyridine or 4-phenylimidazole was used as template. Scanning electron microscopy (SEM) shows that the use of different porphyrins and conditions in the preparation of xerogel produce different product morphologies. The prepared materials have surface areas, between 300 and 1000 m²/g. The electron paramagnetic resonance spectra of trapped materials have characteristic signal of Fe^III high spin, the presence of porphyrin species in a rhombic symmetry and porphyrin aggregates were also observed.