One-step preparation of bifunctionalized surfaces by bipolar electrografting. Issue 5 (6th January 2016)

• Record Type: Journal Article
• Authors: Koefoed, Line; Shimizu, Kyoko; Pedersen, Steen Uttrup; Daasbjerg, Kim; Kuhn, Alexander; Zigah, Dodzi
• Is Part Of: RSC advances. Volume 6:Issue 5(2016)
• Page Start: 3882
• Page End: 3887
• Publication Date: 2016-01-06
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra20156j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Bipolar electrochemistry (BPE) is used for the first time to graft molecular layers of different nature from a single bifunctional precursor compound simultaneously on the two opposite sides of a substrate. Abstract : Bipolar electrochemistry (BPE) is widely used to trigger electrochemical reactions on conducting objects without direct electrical wiring. In this study a novel methodology is reported, which for the first time allows simultaneous deposition of two different organic films at each end of a glassy carbon substrate (1 × 1 cm 2 ). The approach is based on the use of an organic bifunctional molecule, which may be oxidatively and reductively electrografted at the same time. The reduction process goes through the diazonium group, while the oxidation proceeds via the primary amine. The double functionalized plates are investigated by ellipsometry, cyclic voltammetry, condensation imaging, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry. Post-modification of one of the anchoring layers illustrates the versatility of the system, pointing to its potential use in fields going from molecular electronics to targeted drug delivery.