摘要 |
The invention concerns compounds of formula (I), wherein: R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3 </SUB>and R<SUB>4 </SUB>represent a hydrogen atom, an alkyl radical comprising 1 to 4 carbon atoms, a phenyl radical optionally substituted by one or several groups selected among vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy radicals, alkyl or alkyloxy radicals comprising 1 to 4 carbon atoms optionally substituted by one or several bromo, chloro, fluoro or iodo groups; R<SUB>5</SUB>, R<SUB>6</SUB>, R<SUB>7 </SUB>and R<SUB>8 </SUB>represent a hydrogen atom or an alkyl radical comprising 1 to 4 carbon atoms; R<SUB>a</SUB>, R<SUB>b</SUB>, and R<SUB>c </SUB>represent a hydrogen atom, a phenyl radical optionally substituted by one or several groups selected among the vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy radicals, alkyl or alkyloxy radicals comprising 1 to 4 carbon atoms, optionally substituted by one or several bromo, chloro, fluoro or iodo groups. The invention also concerns a silica modified by a compound of formula (I); a sole-gel material derived from a compound of formula (I); a mesoporous silica modified by a compound of formula (I). The invention further concerns the use of said materials for selective trapping of carbon monoxide. |