Topic
Pentanoic Acids
About: Pentanoic Acids is a research topic. Over the lifetime, 56 publications have been published within this topic receiving 1106 citations.
Papers published on a yearly basis
Papers
TL;DR: The ketonic decarboxylation of carboxylic acids has been carried out experimentally and studied theoretically by DFT calculations, showing that the mechanism with the β-keto acid was the kinetically favored one and this was further supported by an experiment employing a mixture of isomeric (linear and branched) pentanoic acids.
Abstract: The ketonic decarboxylation of carboxylic acids has been carried out experimentally and studied theoretically by DFT calculations. In the experiments, monoclinic zirconia was identified as a good catalyst, giving high activity and high selectivity when compared with other potential catalysts, such as silica, alumina, or ceria. It was also shown that it could be used for a wide range of substrates, namely, for carboxylic acids with two to eighteen carbon atoms. The reaction mechanism for the ketonic decarboxylation of acetic acid over monoclinic zirconia was investigated by using a periodic DFT slab model. A reaction pathway with the formation of a β-keto acid intermediate was considered, as well as a concerted mechanism, involving simultaneous carbon-carbon bond formation and carbon dioxide elimination. DFT results showed that the mechanism with the β-keto acid was the kinetically favored one and this was further supported by an experiment employing a mixture of isomeric (linear and branched) pentanoic acids.
138 citations
65 citations
TL;DR: The MFI zeolite coated optical fiber sensors developed for in situ detection of dissolved organics in water exhibited a much slower response to pentanoic acid than to 2-propanol, and it was found that substitution of Si by Al in the MFI framework increased the adsorption of pentanoed acid that resulted in enhanced sensor responses.
Abstract: MFI zeolite coated optical fiber sensors have been developed for in situ detection of dissolved organics in water. The sensors operate by monitoring the optical reflectivity changes caused by the selective adsorption of organic molecules, i.e., 2-propanol or pentanoic acid in this study, from aqueous solutions in the zeolitic pores. Reversible and monotonic sensor signals were observed in response to the variation of 2-propanol concentration in water with fast response. However, the sensor exhibited a much slower response to pentanoic acid than to 2-propanol. It was also found that substitution of Si by Al in the MFI framework increased the adsorption of pentanoic acid that resulted in enhanced sensor responses.
60 citations
Journal Article•
31 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 3 |
| 2019 | 2 |
| 2017 | 1 |
| 2016 | 1 |
| 2015 | 1 |
| 2014 | 1 |