Glassy carbon electrode modified with poly-Neutral Red for photoelectrocatalytic oxidation of NADH

WOS: 000290523600026A new approach is described for the photoelectrocatalytic oxidation of Reduced -Nicotinamide Adenine Dinucleotide (NADH). It is based on a glassy carbon electrode (GCE) modified with a film of poly-Neutral Red (poly-NR) that is obtained by electropolymerization. Electrochemical measurements revealed that the modified electrode displays electrocatalytic and photo-electrocatalytic activity towards oxidation of NADH. If irradiated with a 250-W halogen lamp, the electrode yields a strongly increased electrocatalytic current compared to the current without irradiation. Amperometric and photo-amperometric detection of NADH was performed at +150 mV vs. Ag/AgCl/KClsat and the currents obtained are linearly related to the concentration of NADH. Linear calibration plots are obtained in the concentration range from 1.0 mu M to 1.0 mM for both methods. However, the slope of the current-NADH concentration curve of the photo-electrocatalytic procedure was 2-times better than that obtained without irradiation.Scientific and Technological Research Council of Turkey TUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [107T572]; National Authority for Scientific Research of Romania ANCS [75CB/18.07.2008]; Canakkale Onsekiz Mart University Scientific Research Project CommissionCanakkale Onsekiz Mart University [COMU BAP 2009/15]The authors acknowledge the Scientific and Technological Research Council of Turkey TUBITAK (Project No. 107T572) and The National Authority for Scientific Research of Romania ANCS (Project no. 75CB/18.07.2008) for financial support. Y. Dilgin would like to thank Canakkale Onsekiz Mart University Scientific Research Project Commission Fund for partially supporting of this work with a project (COMU BAP 2009/15)