Surface modification and characterization of phenanthroline nanofilms on carbon substrate

Abstract

Modification of glassy carbon (GC) surfaces with phenanthroline derivatives (PDs) such as 5-amino-1,10-phenanthroline (5AP) and 5,6-diamino-1,10-phenanthroline (56DAP) is described in this study. Surface modification experiments were performed by cyclic voltammetry (CV) scanning from +1.2 to +2.7 V at scan rate of 100 mV/s applying 30 potential scans in acetonitrile (CH 3 CN) containing 1 mM PDs and 100 mM tetrabutylammoniumtetrafluoroborate (TBATFB). The presence of PDs on GC electrode was confirmed using CV, electrochemical impedance spectroscopy (EIS), contact angle measurements and ellipsometry and comparing with the results of bare GC electrode. A mechanism was proposed for the electrochemical modification of the GC electrode surface with PDs. The structure of the 5AP and 56DAP films was also discussed in the light of electrochemical and spectroscopic data. The complex-forming ability of the modified surfaces against metal cations was investigated by square-wave voltammetry (SWV). It was shown that surfaces having 1,10-phenanthroline ligands with different functional groups were quite useful for the determination of transition metal ions.

Synthesis of a Novel [diresorcinate‐1,10‐phenanthrolinecobalt(II)] Complex, and Potentiodynamic Fabrication of Poly(DHRPCo)/GCE for Selective Square Wave Voltammetric Determination of Procaine Penicillin G in Pharmaceutical and Biological Fluid Samples

“…The fact that 1,10‐phenanthroline (phen) and its derivatives interact with metal ions via the nitrogen atom they contain favoring synthesis of metal complexes, they attract researchers in the area of coordination chemistry [22,23] . As metal complexes have unique proprieties such as high accessible surface area, high chemical stability, and excellent electrocatalytic activity; they had been widely applied in the fabrication of electrochemical sensors [15]…”

Evaluation of Some Redox Mediators in the Design of Reagentless Amperometric Glucose Biosensor

“…Anodic peaks at + 300 mV were observed for GRE/TTF/GOx, GRE/TTF-TCNQ/GOx and GRE/5,6-DAP/GOx electrodes ( Figure 3, curves 1-2, 8). Anodic peaks at this potential have been reported in other researches, which are evaluating electron transfer between GOx and electrode [28][29][30]. Well-defined anodic peak at 0 mV for GRE/TB/GOx electrode was registered (Figure 3, curve 3).…”

Mn–Se interactions at the cathode interface during the electrolytic-manganese process

“…All electrochemical experiments were conducted at 40°C, which is the same condition used in many industrial EM processes. CV (Oztekin et al, 2011) was performed within a potential range of 0 V to − 1.8 V and at a scan rate of 100 mV/s. LSV was conducted within a potential range of 0 V to − 1.0 V and at a scan rate of 100 mV/s.…”