Abstract
Polyphenylene films were deposited on Pt or glassy carbon electrodes by anodically oxidizing benzene in liquid hydrogen fluoride. The polymer is electroactive in liquid 
, with a remarkably low oxidation potential. It can also undergo electrochemical oxidation‐reduction in dry propylene carbonate containing 
, and charging/discharging curves of the system are presented. The polymer film is shown to be suitable for electrode surface modification by means of simple chemical reactions performed on the coated electrodes.