200138-14-3Relevant articles and documents
Direct synthesis of ordered and highly functionalized organosilicas containing carboxylic acid groups
Mouawia, Rola,Mehdi, Ahmad,Reye, Catherine,Corriu, Robert
, p. 616 - 618 (2007)
A one step synthesis of highly carboxylic acid-functionalized silica, with lamellar structure under acidic conditions, by hydrolysis and polycondensation of a cyanolkyltrialkoxysilane was analyzed. The method consisted of hydrolysis and polycondensation of 1, 2 and 3 in sulfuric acid aqueous solution in order to transform the cyano groups into carboxylic acid groups. The in situ formation of bis-silyalated dimers by hydrogen-bond formation involved the formation of M1, M2 or M3. The hydrolysis of triethoxysilylpropyldiethylphosphonate in 12 M HCI solution was achieved under the conditions of formation of phosphonic acid groups. The longer the alkylene chains, the better the structural order, which rendered easier uptake of Eu III. The results show that these materials with high content of H+ per g can be used for high proton conductivity for fuel cells.
AROMATIC AMINO SILOXANE FUNCTIONALIZED MATERIALS FOR USE IN CAPPING POROUS DIELECTRICS
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Paragraph 0127; 0129, (2019/05/15)
The present invention relates to new aromatic-amino functional siloxanes, which are compounds comprising one or two tail groups X2, and a linking group L of structure (2) linking each said tail group to said head group, wherein the head group X has structure (1), containing an optional organic moiety Y,wherein the attachment point of said tail group X2 through said linking group L to the head group X1, may be, at positions a, b, c, d, or e. Another aspect of this invention are compositions containing these novel aromatic amino functional siloxane. A further aspect of this invention are compositions comprised of the above novel aromatic-amino functional siloxanes, and also the composition resulting from the aging of these compositions at room temperature for about 1 day to about 4 weeks. Still further aspects of this invention are processes for forming self-assembled monolayers on a substrate, from the aged composition, and also the processes of coating these aged compositions on patterned porous dielectrics to cap them also the processes of metallization of these capped pattered porous dielectrics.
Preparation of bifunctional mesoporous silica nanoparticles by orthogonal click reactions and their application in cooperative catalysis
Dickschat, Arne T.,Behrends, Frederik,Bühner, Martin,Ren, Jinjun,Wei?, Mark,Eckert, Hellmut,Studer, Armido
supporting information, p. 16689 - 16697 (2013/03/14)
The synthesis of bifunctional mesoporous silica nanoparticles is described. Two chemically orthogonal functionalities are incorporated into mesoporous silica by co-condensation of tetraethoxysilane with two orthogonally functionalized triethoxyalkylsilanes. Post-functionalization is achieved by orthogonal surface chemistry. A thiol-ene reaction, Cu-catalyzed 1,3-dipolar alkyne/azide cycloaddition, and a radical nitroxide exchange reaction are used as orthogonal processes to install two functionalities at the surface that differ in reactivity. Preparation of mesoporous silica nanoparticles bearing acidic and basic sites by this approach is discussed. Particles are analyzed by solid state NMR spectroscopy, elemental analysis, infrared-spectroscopy, and scanning electron microscopy. As a first application, these particles are successfully used as cooperative catalysts in the Henry reaction. Cooperative clicking: Bifunctional mesoporous silica particles were synthesized by orthogonal surface chemistry. A thiol-ene reaction, a copper-catalyzed 1,3-dipolar cycloaddition and a radical nitroxide exchange reaction were used as orthogonal processes for the introduction of the acid and base functionalities (see scheme). Catalytic activities of these bifunctionalized inorganic/organic hybrid materials were studied on the Henry reaction. Copyright
