Back to Search
Start Over
Speed Limits for Acid–Base Chemistry in Aqueous Solutions
- Source :
- CHIMIA, Vol 66, Iss 4 (2012)
- Publication Year :
- 2012
- Publisher :
- Swiss Chemical Society, 2012.
-
Abstract
- Proton transfer reactions, including acid–base recombination, are commonly considered to occur 'nearly instantaneously'. However, their actual time scales may stretch far into the microsecond range, as acid–base reactions are diffusion controlled and the concentrations are low near neutral pH. The interplay of competing bases in the pH relaxation is illustrated using a model acid–base system consisting of o-nitrobenzaldehyde (oNBA) as a proton cage and acetate ions and hydroxyl ions as bases. The kinetically controlled behavior leads to highly counterintuitive states, i.e. acetate ions are transiently protonated for hundreds of nanoseconds despite the presence of a much stronger base OH–.
Details
- Language :
- German, English, French
- ISSN :
- 00094293 and 26732424
- Volume :
- 66
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- CHIMIA
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.504852759b54bd08afa8b537458b2a2
- Document Type :
- article
- Full Text :
- https://doi.org/10.2533/chimia.2012.182