Investigation of Protective Properties of Organic Layers toward Reactive Oxygen Species

Yara Aceta (1) , Philippe Hapiot (1) , Yann R Leroux (1)

1 ISCR - Institut des Sciences Chimiques de Rennes

The antioxidant protective properties of polyaromatic organic layers were evaluated toward reactive oxygen species (ROS) using scanning electrochemical microscopy in a foot-printing strategy. The layers were prepared by electrografting of aryldiazonium salts. Where p-(methyl)phenyl films show only weak protective properties toward ROS, p-(ethynyl)phenyl films evidence efficient protection of the covered surfaces. Applied potentials and electrolytes used during oxygen reduction reaction are critical parameters to control, prevent, or reduce the influence of ROS production and hence enhance the device lifetime.

Mots clés: Reactive Oxygen Species (ROS); Scanning Electrochemical Microscopy (SECM); Aryl Diazonium; Surface Functionalization

Domaines: Chimie

Yara Aceta, Philippe Hapiot, Yann R Leroux. Investigation of Protective Properties of Organic Layers toward Reactive Oxygen Species. Langmuir, 2019, 35 (49), pp.16210-16216. ⟨10.1021/acs.langmuir.9b02991⟩. ⟨hal-02397309⟩