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Monofunctional (Dimethylamino)silane as Silylating Agent
Author(s) -
Szabó Katalin,
Ha Ngoc Le,
Schneider Philippe,
Zeltner Peter,
Kováts Ervin sz.
Publication year - 1984
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19840670813
Subject(s) - silanes , dimethylamine , chemistry , silane , silicon , silicon dioxide , organic chemistry , polymer chemistry , surface modification , chemical engineering , engineering
The reaction of triorganyl(dimethylamino)silanes with surface‐hydrated silicon dioxide has been studied. These silylating agents are easy to prepare from the corresponding chloro or bromosilanes with dimethylamine. The resulting products are thermally stable and relatively volatile. Reaction with surface‐hydrated silicon‐dioxide preparations at 150–250°C for 170 h yields a dense grafted layer. However, with (dimethylamino)silanes having strongly polar substituents, a retreatment of the surface‐modified silica seems to be necessary in order to attain maximum coverage.