NADH oxidation using carbonaceous electrodes modified with dibenzo-dithia-diazapentacene
(2003) In Electroanalysis 15(5-6). p.383-391- Abstract
- The electrochemical and the electrocatalytic behavior for NADH oxidation of a newly synthesized phenothiazine derivative, 16H,18H-dibenzo[c,1]-7,9-dithia-16,18-diazapentacene (DDDP), adsorbed on solid spectrographic graphite and on graphite powder or on zirconium phosphate (ZP), both entrapped in carbon paste, were compared. Experiments using cyclic voltammetry and a rotating disk electrode, performed in different experimental conditions (various pH values and NADH concentrations), showed that i) in the pH range between 4 and 8, the E°' value for DDDP adsorbed on ZP becomes pH independent; ii) in contrast to other redox mediators, adsorption of DDDP on ZP induced a significant negative shift of the E°' value; iii) the reaction rate for... (More)
- The electrochemical and the electrocatalytic behavior for NADH oxidation of a newly synthesized phenothiazine derivative, 16H,18H-dibenzo[c,1]-7,9-dithia-16,18-diazapentacene (DDDP), adsorbed on solid spectrographic graphite and on graphite powder or on zirconium phosphate (ZP), both entrapped in carbon paste, were compared. Experiments using cyclic voltammetry and a rotating disk electrode, performed in different experimental conditions (various pH values and NADH concentrations), showed that i) in the pH range between 4 and 8, the E°' value for DDDP adsorbed on ZP becomes pH independent; ii) in contrast to other redox mediators, adsorption of DDDP on ZP induced a significant negative shift of the E°' value; iii) the reaction rate for electrocatalytic oxidation of NADH is markedly increased by adsorbing the mediator on ZP, being further improved by the presence of Ca2+ ions in the solution. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/128936
- author
- Munteanu, Florentina LU ; Dicu, D ; Popescu, I C and Gorton, Lo LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Electroanalysis
- volume
- 15
- issue
- 5-6
- pages
- 383 - 391
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- wos:000182694800006
- scopus:0037660194
- ISSN
- 1040-0397
- DOI
- 10.1002/elan.200390044
- 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
- 4108eb22-b738-42d8-884b-6f63724f904f (old id 128936)
- date added to LUP
- 2016-04-01 15:44:26
- date last changed
- 2022-01-28 06:49:29
@article{4108eb22-b738-42d8-884b-6f63724f904f, abstract = {{The electrochemical and the electrocatalytic behavior for NADH oxidation of a newly synthesized phenothiazine derivative, 16H,18H-dibenzo[c,1]-7,9-dithia-16,18-diazapentacene (DDDP), adsorbed on solid spectrographic graphite and on graphite powder or on zirconium phosphate (ZP), both entrapped in carbon paste, were compared. Experiments using cyclic voltammetry and a rotating disk electrode, performed in different experimental conditions (various pH values and NADH concentrations), showed that i) in the pH range between 4 and 8, the E°' value for DDDP adsorbed on ZP becomes pH independent; ii) in contrast to other redox mediators, adsorption of DDDP on ZP induced a significant negative shift of the E°' value; iii) the reaction rate for electrocatalytic oxidation of NADH is markedly increased by adsorbing the mediator on ZP, being further improved by the presence of Ca2+ ions in the solution.}}, author = {{Munteanu, Florentina and Dicu, D and Popescu, I C and Gorton, Lo}}, issn = {{1040-0397}}, language = {{eng}}, number = {{5-6}}, pages = {{383--391}}, publisher = {{John Wiley & Sons Inc.}}, series = {{Electroanalysis}}, title = {{NADH oxidation using carbonaceous electrodes modified with dibenzo-dithia-diazapentacene}}, url = {{http://dx.doi.org/10.1002/elan.200390044}}, doi = {{10.1002/elan.200390044}}, volume = {{15}}, year = {{2003}}, }