A SERS-based molecular sensor for selective detection and quantification of copper(II) ions

Dugandzic V, Kupfer S, Jahn M, Henkel T, Weber K, Cialla-May D, Popp J (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Sensors and Actuators B-Chemical Elsevier

Book Volume: 279

Pages Range: 230-237

DOI: 10.1016/j.snb.2018.09.098

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 5 × 10−8 M 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 7.87 × 10−6 M (0.5 μg/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.

Involved external institutions

Leibniz-Institut für Photonische Technologien e.V. DE Germany (DE) Friedrich-Schiller-Universität Jena DE Germany (DE)

How to cite

APA:

Dugandzic, V., Kupfer, S., Jahn, M., Henkel, T., Weber, K., Cialla-May, D., & Popp, J. (2019). A SERS-based molecular sensor for selective detection and quantification of copper(II) ions. Sensors and Actuators B-Chemical, 279, 230-237. https://doi.org/10.1016/j.snb.2018.09.098

MLA:

Dugandzic, Vera, et al. "A SERS-based molecular sensor for selective detection and quantification of copper(II) ions." Sensors and Actuators B-Chemical 279 (2019): 230-237.

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