Organic surface modification using stable conducting materials

Abstract

Efficient immobilization methods of amino acids and organic molecules on conducting surfaces were achieved using stable conducting materials such as OBT-functionalized polyterthiophene that allows readily the incorporation of specific motifs on conducting and semi-conducting surfaces. The synthesis of the electropolymerizable monomer has been performed through the protection of the carboxylic acid, followed by a Stille cross coupling reaction, deprotection of the acid and esterification using HOBT (hydroxybenzotriazole) and EDC. The corresponding polymer of 5 (poly(5)–Pt) exhibits excellent stability on a platinum electrode as shown by cyclic voltammetry, which allows the introduction of several amino acids and organic molecules on the surface of the functionalized polymer. The modified surface (poly(6)–Pt) has been characterized by ATR-Infrared showing a carbonyl stretch corresponding to an amide of the amino acids.