ORMOSIL organically modified

Furthermore, the same sol-gel matrices have been used in a system where acid and base catalysis occur in the same pot without quenching either catalyst [29]. In this case, the acids were either entrapped Nafion (perfluorinated resin sulfonic super acid, a3) or entrapped molybdic acid (M03-Si02, a2), while the bases were two ORMOSILs (organically modified silica sol-gel materials), one with H2N (CH2)2NH(CH2)3 groups (bi) and the other guanidine base residues (b2) (Scheme 5.12). 

Finally, some hybrid inorganic-organic materials such as Ormosil (=Organically modified silica) are also very popular. The structure and properties of Ormosils resemble those of silica and organic polymers. 

It is known that the advantages of imprinted ormosils (organically modified silanes) over acrylic-based MIPs are their chemical stability, the high thermal stability of sol-gel materials, synthesis in mild temperature conditions, optical transparency, photo-, electro- and chemical stability, all properties that made these materials ideal for use in optical sensing approaches, particularly in aqueous samples.48 50 Although... 

Finally, materials where organic functional branches have been grafted onto an inorganic backbone (ORMOSIL, ORganically MOdified SILicates), as shown below... 

Ormosil ORganically Modified SILicates hybrid silica aerogels obtained by gelation of a solid network with functionalized silica precursors on which some specific organic moieties have been grafted... 

Within the examples appearing in the hterature, the synthetic strategy used by Prasad and coworkers to obtain the so-called ORMOSIL (ORganic-Modified SILica) nanoparticles stands out for versatility and simplicity. It is based on an... 

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