CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6]
The oxidation of ascorbic acid by K3[Fe(CN)6] was studied in reverse micellar systems composed of CTAB (Cetyltrimethylammonium bromide), and it was found the observed first order (k1(aq) = 5.2×10−5 s−1, k1(rev) = 61.4×10−4 s−1) rate constant in reverse micellar medium is around forty times higher...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)
2022-03-01
|
| Series: | Bulletin of Chemical Reaction Engineering & Catalysis |
| Subjects: | |
| Online Access: | https://journal.bcrec.id/index.php/bcrec/article/view/12732 |
| _version_ | 1827810363122384896 |
|---|---|
| author | K. Bhargavi P. Shyamala P S S Chakravarthi K V Nagalakshmi |
| author_facet | K. Bhargavi P. Shyamala P S S Chakravarthi K V Nagalakshmi |
| author_sort | K. Bhargavi |
| collection | DOAJ |
| description | The oxidation of ascorbic acid by K3[Fe(CN)6] was studied in reverse micellar systems composed of CTAB (Cetyltrimethylammonium bromide), and it was found the observed first order (k1(aq) = 5.2×10−5 s−1, k1(rev) = 61.4×10−4 s−1) rate constant in reverse micellar medium is around forty times higher compared to aqueous medium under identical conditions. The rate enhancement (k2(aq) = 0.9×10−5 mole−1.dm3.sec−1, k2(rev) = 1.75×10−3 mole−1.dm3.sec−1) is attributed to the large concentration effect and lower dielectric constant in the reverse micelles. The rate of the reaction increases with increase in W = {[H2O]/[surfactant]} which is explained in terms of ionic strength of the water pool. The effect of surfactant concentration on rate was explained on the basis of Berezin pseudo phase model. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). |
| first_indexed | 2024-03-11T22:51:29Z |
| format | Article |
| id | doaj.art-3817d3c3a27d42bc805ba334d5e5057a |
| institution | Directory Open Access Journal |
| issn | 1978-2993 |
| language | English |
| last_indexed | 2024-03-11T22:51:29Z |
| publishDate | 2022-03-01 |
| publisher | Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS) |
| record_format | Article |
| series | Bulletin of Chemical Reaction Engineering & Catalysis |
| spelling | doaj.art-3817d3c3a27d42bc805ba334d5e5057a2023-09-22T03:26:41ZengMasyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)Bulletin of Chemical Reaction Engineering & Catalysis1978-29932022-03-0117115716210.9767/bcrec.17.1.12732.157-1625983CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6]K. Bhargavi0P. Shyamala1P S S Chakravarthi2K V Nagalakshmi3Department of Physical and Nuclear Chemistry and Chemical Oceanography, School of Chemistry, Andhra University, Visakhapatnam, AP, IndiaDepartment of Physical and Nuclear Chemistry and Chemical Oceanography, School of Chemistry, Andhra University, Visakhapatnam, AP, IndiaDepartment of Physical and Nuclear Chemistry and Chemical Oceanography, School of Chemistry, Andhra University, Visakhapatnam, AP, IndiaDepartment of Chemistry, Gayathri Vidya Parishad College of Engineering (Autonomous), Madhurawada, Visakhapatna, AP, IndiaThe oxidation of ascorbic acid by K3[Fe(CN)6] was studied in reverse micellar systems composed of CTAB (Cetyltrimethylammonium bromide), and it was found the observed first order (k1(aq) = 5.2×10−5 s−1, k1(rev) = 61.4×10−4 s−1) rate constant in reverse micellar medium is around forty times higher compared to aqueous medium under identical conditions. The rate enhancement (k2(aq) = 0.9×10−5 mole−1.dm3.sec−1, k2(rev) = 1.75×10−3 mole−1.dm3.sec−1) is attributed to the large concentration effect and lower dielectric constant in the reverse micelles. The rate of the reaction increases with increase in W = {[H2O]/[surfactant]} which is explained in terms of ionic strength of the water pool. The effect of surfactant concentration on rate was explained on the basis of Berezin pseudo phase model. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).https://journal.bcrec.id/index.php/bcrec/article/view/12732ascorbic acid[k3fe(cn)6]ctab (cetyltrimethylammonium bromide)dielectric constantreverse micelles. |
| spellingShingle | K. Bhargavi P. Shyamala P S S Chakravarthi K V Nagalakshmi CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6] Bulletin of Chemical Reaction Engineering & Catalysis ascorbic acid [k3fe(cn)6] ctab (cetyltrimethylammonium bromide) dielectric constant reverse micelles. |
| title | CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6] |
| title_full | CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6] |
| title_fullStr | CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6] |
| title_full_unstemmed | CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6] |
| title_short | CTAB Reverse Micelles as Catalysts for the Oxidation of Ascorbic Acid by K3[Fe(CN)6] |
| title_sort | ctab reverse micelles as catalysts for the oxidation of ascorbic acid by k3 fe cn 6 |
| topic | ascorbic acid [k3fe(cn)6] ctab (cetyltrimethylammonium bromide) dielectric constant reverse micelles. |
| url | https://journal.bcrec.id/index.php/bcrec/article/view/12732 |
| work_keys_str_mv | AT kbhargavi ctabreversemicellesascatalystsfortheoxidationofascorbicacidbyk3fecn6 AT pshyamala ctabreversemicellesascatalystsfortheoxidationofascorbicacidbyk3fecn6 AT psschakravarthi ctabreversemicellesascatalystsfortheoxidationofascorbicacidbyk3fecn6 AT kvnagalakshmi ctabreversemicellesascatalystsfortheoxidationofascorbicacidbyk3fecn6 |