Gas-phase acylation of aminopropyl-silica gel in the synthesis of some chemically bonded silica materials for analytical applications
✍ Scribed by Vladimir A. Basiuk; Elena G. Khil'chevskaya
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 733 KB
- Volume
- 255
- Category
- Article
- ISSN
- 0003-2670
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✦ Synopsis
Gas-phase acylation of ammopropyl-sllrca gel v&h ahphatlc dlcarboxyhc (succnuc, adlplc and sebaclc) and 4-ammobenxolc acids IS proposed as a rapld and efficient one-step method for the syntheses of carboxyalkyl-and 4-ammophenylamidopropyl-s&a gels, usually used as zwltterlon exchangers for hqmd chromatography and matrices for multi-step syntheses of s~lca-bound aromattc azo reagents for the sorption and chromatographlc separation of metal ions Acylation degrees of 59-90% are achieved atier 0 5 h IR spectra of the acylatton products and near-UV-visible spectra for bonded aromatic azo compounds, based on 4_ammobenzanudopropyl-&ca gel, are presented Some positwe and negative aspects of the gas-phase acylatlon are &scussed