✦ LIBER ✦
Basische Oberflächenoxide auf Kohlenstoff—IV. Chemische Reaktionen zur Identifizierung der Oberflächengruppen
✍ Scribed by M. Voll; H.P. Boehm
- Publisher
- Elsevier Science
- Year
- 1971
- Tongue
- English
- Weight
- 759 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0008-6223
No coin nor oath required. For personal study only.
✦ Synopsis
The nature of the basic surface oxides on carbon was studied by chemical reactions, e.g. methylation with methanol/sulphuric acid. Each basic site contains two oxygen atoms, one of which may be exchanged for a nitrogen atom on treatment with aqueous ammonia, ammonium salts or amines. The resulting changes in adsorption of mineral acids and content of active hydrogen indicate that at least a considerable part of the basic surface oxides have pyrone-like structures. Experimental evidence contradicting earlier structure models is summarized.