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Direct synthesis and accessibility of amine-functionalized mesoporous silica templated using fluorinated surfactants / Gifty Osei-Prempeh in Industrial & engineering chemistry research, Vol. 50 N° 9 (Mai 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5510–5522 Titre : Direct synthesis and accessibility of amine-functionalized mesoporous silica templated using fluorinated surfactants Type de document : texte imprimé Auteurs : Gifty Osei-Prempeh, Auteur ; Hans-Joachim Lehmler, Auteur ; Stephen E. Rankin, Auteur Année de publication : 2011 Article en page(s) : pp. 5510–5522 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Surfactant Résumé : 3-Aminopropyl functionalized silica is synthesized directly using cationic fluorinated surfactants (C6F13C2H2NC5H5Cl (HFOPC) and C8F17C2H2NC5H5Cl (HFDePC)) and a hydrocarbon surfactant (C16H33N(CH3)3Br (CTAB)) as templates. The resulting 3-aminopropyl functionalized silica has a two-dimensional hexagonal pore structure, with greater order and surface area in the CTAB-templated material than the fluorinated-surfactant-templated materials. Greater amine incorporation is achieved using CTAB (1.44 mmol/g), with the least amine incorporation being observed in the HFDePC-templated material (0.92 mmol/g). The incorporation of fluorescein isothiocyanate (FITC) is used to qualitatively probe the accessibility of the amine groups. The reaction of benzaldehyde with the amine groups results in the incorporation of benzaldehyde, which is consistent with the higher accessibility of amines in fluorocarbon-surfactant-templated silica. The interaction of dry CO2 with amines results in higher CO2 sorbed in 3-aminopropyl-functionalized silica than nonfunctionalized silica, with greater amine accessibility being observed in the fluorocarbon-templated silica. The incorporation of perfluorooctyl in 3-aminopropyl-functionalized silica reduces the physisorption and CO2−amine interaction. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128674 [article] Direct synthesis and accessibility of amine-functionalized mesoporous silica templated using fluorinated surfactants [texte imprimé] / Gifty Osei-Prempeh, Auteur ; Hans-Joachim Lehmler, Auteur ; Stephen E. Rankin, Auteur . - 2011 . - pp. 5510–5522. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 9 (Mai 2011) . - pp. 5510–5522 Mots-clés : Surfactant Résumé : 3-Aminopropyl functionalized silica is synthesized directly using cationic fluorinated surfactants (C6F13C2H2NC5H5Cl (HFOPC) and C8F17C2H2NC5H5Cl (HFDePC)) and a hydrocarbon surfactant (C16H33N(CH3)3Br (CTAB)) as templates. The resulting 3-aminopropyl functionalized silica has a two-dimensional hexagonal pore structure, with greater order and surface area in the CTAB-templated material than the fluorinated-surfactant-templated materials. Greater amine incorporation is achieved using CTAB (1.44 mmol/g), with the least amine incorporation being observed in the HFDePC-templated material (0.92 mmol/g). The incorporation of fluorescein isothiocyanate (FITC) is used to qualitatively probe the accessibility of the amine groups. The reaction of benzaldehyde with the amine groups results in the incorporation of benzaldehyde, which is consistent with the higher accessibility of amines in fluorocarbon-surfactant-templated silica. The interaction of dry CO2 with amines results in higher CO2 sorbed in 3-aminopropyl-functionalized silica than nonfunctionalized silica, with greater amine accessibility being observed in the fluorocarbon-templated silica. The incorporation of perfluorooctyl in 3-aminopropyl-functionalized silica reduces the physisorption and CO2−amine interaction. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24128674