Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11016366 | Sensors and Actuators B: Chemical | 2019 | 30 Pages |
Abstract
A novel SERS-based molecular sensor for detection and quantification of copper(II) ions with very good specificity and selectivity is reported in this work. The sensing is enabled by the employment of a synthesized dipicolylamine-based ligand anchored onto plasmonic gold nanoparticles through the sulfur atom of the methylthio group. The interaction of the ligand with copper(II) ions is followed by changes in the spectral features associated with pyridine ring breathing, as indicated by quantum chemical calculations performed at the density functional level of theory, which are proportional to the copper(II) concentration. The detection of copper(II) was possible down to 5âÃâ10â8âM in water. The proposed molecular sensor was applied for the detection of copper(II) ions in white wine, with the ability to detect amounts of copper(II) in wine lower than the maximum recommended amount of 7.87âÃâ10â6âM (0.5âμg/mL), indicating that the proposed molecular sensor is of potential interest as a routine test for the control of the copper(II) content in wine during wine production and in the final product.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Vera DugandžiÄ, Stephan Kupfer, Martin Jahn, Thomas Henkel, Karina Weber, Dana Cialla-May, Jürgen Popp,