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1987 (1)
1Author    Leopold Horner, Hans ZieglerRequires cookie*
 Title    Chemie an starren Grenzflächen, 7 [1] Ausgewählte Beispiele der chemischen Grenzflächenmodifizierung von Aerosil Selected Examples of the Chemical Surface Modification of Aerosil  
 Abstract    Aminoaerosil containing primary amino end groups is obtained according (1) by reaction of aerosil with y-triethoxysilylpropyl amine (Table II). The NH r anchor groups are acylated in the usual manner: carbonic acid anhydrides, acid chlorides and acid azides and by application of the carbodiimide method (Table III). Optically active groups and phosphoric acid diestergroups are covalently linked with the surface of aerosil according (2) and (3). Aminoaerosil reacts with vinylsulfones as anchor groups of dyes (Remazol-Dyes) producing a covalent bond according (6). Functional groups linked to the surface of aerosil react "normal" (with respect to homogenous solutions) with group specific reagents. Examples: bromination, ozonization of C—C double bonds, hydrolysis of phosphoric acid esteramidates and surface bound chloroamine-T groups. "Interparticular" reactions of modified aerosil are not observed. But aerosil with electroactive groups are electroreduced using Hg-or Pb-electrodes. The optical induction of the catalytic hydrogenation of prochiral defines using palladium deposited on chiral modified aerosil surfaces is low (ca. 1%). Some analytical methods are presented, which are recommended for the determination of the amount of functional groups bound to the surface. 
  Reference    Z. Naturforsch. 42b, 643—660 (1987); eingegangen am 18. August 1986 
  Published    1987 
  Keywords    Polymer Silicic Acids, y-Triethoxysilylpropylamine, Synthesis, Surface Linked Groups, "Interparticular" Reactions 
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 TEI-XML for    default:Reihe_B/42/ZNB-1987-42b-0643.pdf 
 Identifier    ZNB-1987-42b-0643 
 Volume    42