Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 255, Issue -, Pages 2756-2763Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.09.090
Keywords
Mercury(II) colorimetric sensor; Cysteine detection; Pyrimidine
Funding
- Ministry of Education, Science and Technology [NRF-2015R1A2A2A09001301, NRF-2016M3D3A1A01913239]
- Brigham Young University
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A new sensor for Hg2+ and cysteine detection has been synthesized and tested. The sensor based on cinamaldehyde and pyrimidine absorbs visible light when exposed to Hg2+ and becomes colored. The sensor only changes color due to Hg2+ and does not change when exposed to some other metal ions. Calculations show the change in color is due to lowering of the HOMO-LUMO transition. Titrations show the sensor-Hg2+ complex is composed of two sensor molecules per Hg2+. The limit of detection for Hg2+ is 0.39 mu M. The sensor-Hg2+ complex selectively responds to cysteine (Cys), but does not show a color change due to other amino acids. The limit of detection of Cys by the sensor-Hg2+ complex is 0.10 mu M. (C) 2017 Elsevier B.V. All rights reserved.
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