摘要:
The invention concerns a method for preparing organic-inorganic hybrid materials with controlled porosity and functionality comprising hydrolysis and condensation polymerization of a compound of formula (I): Z-R1—Si(OR)(OR′)(OR″), with an alkaline or alkaline-earth silicate in a mol ratio of (I)/(silicate)=1:9, in the presence of a non-ionic surfactant, to form a mesoporous silica represented by Z-R1—SiO1.5 9 SiO2, whereon is then anchored an organic compound, represented by (Δ)N—H, comprising a —NH— group capable of reacting with Z, to form a functionalized mesoporous silica represented by (Δ)N—R—SiO1.5 9 SiO2, which is optionally complexed with a metallic cation to form an organometallic complex. The invention also concerns the use of these materials to separate gases.
摘要:
The invention relates to the use of molecular tweezers as sensitive materials in chemical sensors intended to detect or assay organic compounds in the vapour state, and in particular nitro compounds.These molecular tweezers correspond to the general formula (I): in which: MC1 and MC2 represent macrocycles; p and q are equal to 0 or 1; X and Y are optionally substituted C1 to C10 alkylene groups; while E represents an optionally substituted cyclic or heterocyclic spacer group; and in which MC1 and MC2 are positioned facing each other. Fields of application: detection of explosives, control and monitoring of atmospheric pollution and of the quality of ambient air in relatively confined spaces, and monitoring of industrial sites.
摘要:
The invention concerns compounds of formula (I), wherein: R1, R2, R3 and R4 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; R5, R6, R7 and R8 represent a hydrogen atom or an alkyl radical comprising 1 to 4 carbon atoms; Ra, Rb, and Rc 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.
摘要翻译:本发明涉及式(I)化合物,其中:R 1,R 2,R 3和R 4 SUB 表示氢原子,含有1至4个碳原子的烷基,任选被一个或多个选自乙烯基,羟基,硝基,氨基,溴,氯,氟,碘,苄氧基,烷基或烷氧基的基团取代的苯基 包含1至4个碳原子的基团,任选被一个或几个溴,氯,氟或碘基取代; R 5,R 6,R 7和R 8表示氢原子或烷基,其包含1〜 4个碳原子; R a,R b和R c表示氢原子,任选地被一个或几个选自乙烯基, 羟基,硝基,氨基,溴,氯,氟,碘,苄氧基,包含1至4个碳原子的烷基或烷氧基,任选被一个或几个溴,氯,氟或碘基取代。 本发明还涉及通过式(I)化合物改性的二氧化硅; 衍生自式(I)化合物的唯一凝胶材料; 由式(I)化合物改性的介孔二氧化硅。 本发明还涉及所述材料用于选择性捕集一氧化碳的用途。