Chemistry
Simple, Robust, and Plasticizer-Free Iodide-Selective Sensor Based on Copolymerized Triazole-Based Ionic Liquid
Document Type
Article
Abstract
Novel solid-contact iodide-selective electrodes based on covalently attached 1,2,3 triazole ionic liquid (IL) were prepared and investigated in this study. Triazole-based IL moieties were synthesized using click chemistry and were further copolymerized with lauryl methacrylate via a simple one-step free radical polymerization to produce a "self-plasticized" copolymer. The mechanical properties of the copolymer are suitable for the fabrication of plasticizer-free ion-selective membrane electrodes. We demonstrate that covalently attached IL moieties provide adequate functionality to the ion-selective membrane, thus achieving a very simple, one-component sensing membrane. We also demonstrate that the presence of iodide as the counterion in the triazole moiety has direct influence on the membrane's functionality. Potentiometric experiments revealed that each electrode displays high selectivity toward iodide anions over a number of inorganic anions. Moreover, the inherent presence of the iodide in the membrane reduces the need for conditioning. The nonconditioned electrodes show strikingly similar response characteristics compared to the conditioned ones. The electrodes exhibited a near Nernstian behavior with a slope of -56.1 mV per decade across a large concentration range with lower detection limits found at approximately 6.3 × 10-8 M or 8 ppb. These all-solid-state sensors were utilized for the selective potentiometric determination of iodide ions in artificial urine samples in the nanomolar concentration range.
Publication Title
Analytical Chemistry
Publication Date
5-3-2016
Volume
88
Issue
8
First Page
4311
Last Page
4317
ISSN
0003-2700
DOI
10.1021/acs.analchem.5b04461
Keywords
electrodes, free radical polymerization, free radicals, Ion selective membranes, ionic liquids, Ions, membranes, nitrogen compoundslasticizers, potentiometers, reinforced plastics, solid-state sensors
Repository Citation
Mendecki, Lukasz; Chen, Xiaorui; Callan, Nicole; Thompson, David F.; Schazmann, Benjamin; Granados-Focil, Sergio; and Radu, Aleksandar, "Simple, Robust, and Plasticizer-Free Iodide-Selective Sensor Based on Copolymerized Triazole-Based Ionic Liquid" (2016). Chemistry. 82.
https://commons.clarku.edu/chemistry/82
Cross Post Location
Student Publications