ISSN:
1435-1536
Keywords:
Phenylsilanes
;
sepiolite
;
poly(organosiloxanes)
;
tetraethyl-orthosilicate (TEOS)
;
graftingreactions
;
sol-gel
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Grafting reactions of phenyl groups on silica substrates using as reagents various phenylsilanes with variable distances between the silicon atoms and the aromatic ring by 0, 1, and 2 methylene groups [≡Si−(CH2) n −C6H5] were studied. Two different silicates have been selected as source of silica: sepiolite and tetraethyl-orthosilicate (TEOS). Sulfonic- and nitro-derivatives prepared from these phenyl compounds by electrophilic substitution reactions, have been obtained. The mechanism of these processes has been studied in relation to the number of methylene separating groups belonging to the starting reagents. The characterization of such systems has been achieved by XRD,29Si and13C NMR/MAS, IR, and laser microprobe mass spectrometry.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00652183
Permalink