Photoelectrocatalytic Oxidation of NADH at a Graphite Electrode Modified with a New Polymeric Phenothiazine
(2009) 12th International Conference on Electroanalysis 21(3-5). p.360-367- Abstract
- A new approach for photoelectrocatalytic oxidation of NADH is described, based on a graphite electrode (G) modified with a new phenothiazine derivative, polyphenothiazine formaldehyde (PPF). Electrochemical measurements reveal that G/PPF presents a quasireversible voltammetric response, corresponding to a 2e(-)/2H(+) transfer and that G/PPF modified electrodes show electrocatalytic activity for NADH oxidation. When the surface of the G/PPF modified electrode was irradiated with a light source (250 W Halogen lamp), a significant increase in the electrocatalytic current was observed. The second order electrocatalytic rate constant (k(obs,[NADH]=0) = 3.9 x 10(3) M-1 s(-1), pH 7.0) was calculated from rotating disk electrode experiments,... (More)
- A new approach for photoelectrocatalytic oxidation of NADH is described, based on a graphite electrode (G) modified with a new phenothiazine derivative, polyphenothiazine formaldehyde (PPF). Electrochemical measurements reveal that G/PPF presents a quasireversible voltammetric response, corresponding to a 2e(-)/2H(+) transfer and that G/PPF modified electrodes show electrocatalytic activity for NADH oxidation. When the surface of the G/PPF modified electrode was irradiated with a light source (250 W Halogen lamp), a significant increase in the electrocatalytic current was observed. The second order electrocatalytic rate constant (k(obs,[NADH]=0) = 3.9 x 10(3) M-1 s(-1), pH 7.0) was calculated from rotating disk electrode experiments, performed at various NADH concentrations. From amperometric measurements, it was noticed that, in the presence of light irradiation, the sensitivity of NADH detection (calculated as I-max/K-M ratio) increased ca. 3 times. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1404934
- author
- Gligor, Delia ; Dilgin, Yusuf ; Popescu, Ionel Catalin and Gorton, Lo LU
- organization
- publishing date
- 2009
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Modified, Phenothiazine derivative, NADH, Electrocatalytic oxidation, graphite electrodes
- host publication
- Electroanalysis
- volume
- 21
- issue
- 3-5
- pages
- 360 - 367
- publisher
- John Wiley & Sons Inc.
- conference name
- 12th International Conference on Electroanalysis
- conference location
- Prague, Czech Republic
- conference dates
- 2008-06-16 - 2008-06-19
- external identifiers
-
- wos:000264063500018
- scopus:60549108448
- ISSN
- 1040-0397
- DOI
- 10.1002/elan.200804397
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Analytical Chemistry (S/LTH) (011001004)
- id
- d1f7f9b5-2621-4102-8135-11d736f465f2 (old id 1404934)
- date added to LUP
- 2016-04-01 14:04:30
- date last changed
- 2022-01-27 22:39:12
@inproceedings{d1f7f9b5-2621-4102-8135-11d736f465f2, abstract = {{A new approach for photoelectrocatalytic oxidation of NADH is described, based on a graphite electrode (G) modified with a new phenothiazine derivative, polyphenothiazine formaldehyde (PPF). Electrochemical measurements reveal that G/PPF presents a quasireversible voltammetric response, corresponding to a 2e(-)/2H(+) transfer and that G/PPF modified electrodes show electrocatalytic activity for NADH oxidation. When the surface of the G/PPF modified electrode was irradiated with a light source (250 W Halogen lamp), a significant increase in the electrocatalytic current was observed. The second order electrocatalytic rate constant (k(obs,[NADH]=0) = 3.9 x 10(3) M-1 s(-1), pH 7.0) was calculated from rotating disk electrode experiments, performed at various NADH concentrations. From amperometric measurements, it was noticed that, in the presence of light irradiation, the sensitivity of NADH detection (calculated as I-max/K-M ratio) increased ca. 3 times.}}, author = {{Gligor, Delia and Dilgin, Yusuf and Popescu, Ionel Catalin and Gorton, Lo}}, booktitle = {{Electroanalysis}}, issn = {{1040-0397}}, keywords = {{Modified; Phenothiazine derivative; NADH; Electrocatalytic oxidation; graphite electrodes}}, language = {{eng}}, number = {{3-5}}, pages = {{360--367}}, publisher = {{John Wiley & Sons Inc.}}, title = {{Photoelectrocatalytic Oxidation of NADH at a Graphite Electrode Modified with a New Polymeric Phenothiazine}}, url = {{http://dx.doi.org/10.1002/elan.200804397}}, doi = {{10.1002/elan.200804397}}, volume = {{21}}, year = {{2009}}, }