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Mesoporous silica is a very suitable carrier for preparation of sensors for detection of explosive compounds with high selectivity and rapid responsiveness by incorporating chemical sensing units into silica films. Three types of porphyrin-doped silica with mesoporous and amorphous structures were prepared. 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin was synthesized in two steps starting from p-methoxycarbonylbenzaldehyde...
Three kinds of heteroaldehydes, N-(3-triethoxysilylpropyl)-4-formyl benzamide (TPHA/SiO2), were prepared by the reaction of terephthalaldehydic acid with different silica supports such as hexagonal SBA-15, spherical SBA-15 and amorphous SiO2 for comparison purposes. Anchoring of this aldehyde to different supports allows the synthesis of mono-substituted porphyrins without the production of di-, tri-...
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