Electrochemical Recognition of Chiral Molecules with Poly(4‐bromoaniline) Modified Gold Electrode. Issue 8 (16th July 2013)

• Record Type: Journal Article
• Authors: Li, Jun; Hu, Xuefeng; Wang, Jichang
• Is Part Of: Electroanalysis. Volume 25:Issue 8(2013:Aug.)
• Page Start: 1975
• Page End: 1980
• Publication Date: 2013-07-16
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201300182
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A poly(4‐bromoaniline) (PBA) film is electrochemically synthesized on a gold electrode for the recognition of amino acids enantiomers. Scanning electron microscopy measurements show that the porous PBA films are made up of nano‐ribbons. At the PBA modified Au electrode differential pulse voltammograms of <sc>L</sc>‐ and <sc>D</sc>‐glutamic acids not only have very different current densities, but also produce different waveforms, providing an intuitive way to differentiate the two chiral molecules. Similar results are obtained in analyzing <sc>L</sc>‐ and <sc>D</sc>‐aspartic acids. Control experiments suggest that the observed sensing behavior arises from synergistic interactions between Au and the PBA film, where polymerization at the <italic>meta</italic>‐position creates a steric structure needed for differentiating chiral molecules.</p> </abstract>