Development of a novel flow sensor for copper trace analysis by electrochemical reduction of 4-methoxybenzene diazonium salt

Bogdan Feier (1, 2) , Didier Floner (1) , Cecilia Cristea (2) , Robert Sandulescu (2) , Florence Geneste (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 Université Cluj-Napoca

Due to the rapidity and the effectiveness of the method, the reduction of diazonium salts has been widely used to functionalize electrodes for sensor applications. However, the resulting organic film usually designed to provide complexing capabilities for the species to be determined could affect the sensor properties. The electrochemical reduction of 4-methoxybenzene diazonium salt on graphite felt that leads to the formation of an organic film with unexpected high affinity for copper ions is presented. This property combined with a flow electrochemical system led us to achieve a sensitive sensor for copper detection, with good selectivity towards some common interferent ions.

Keywords: Sensor; Graphite felt; Diazonium salts; Copper; Flow

Domains: Material chemistry

Bogdan Feier, Didier Floner, Cecilia Cristea, Robert Sandulescu, Florence Geneste. Development of a novel flow sensor for copper trace analysis by electrochemical reduction of 4-methoxybenzene diazonium salt. Electrochemistry Communications, 2013, 31, pp.13-15. ⟨10.1016/j.elecom.2013.02.025⟩. ⟨hal-00844366⟩