A dual sensor selective for Hg2+ and cysteine detection

Jae Min Jung; Cheal Kim; Roger G. Harrison

doi:10.1016/j.snb.2017.09.090

A dual sensor selective for Hg²⁺ and cysteine detection

Jae Min Jung
, Cheal Kim
, Roger G. Harrison

Dept. of Fine Chemistry

Seoul National University of Science and Technology (SNUST)
Brigham Young University

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

Abstract

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 μM. 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 μM.

Original language	English
Pages (from-to)	2756-2763
Number of pages	8
Journal	Sensors and Actuators, B: Chemical
Volume	255
DOIs	https://doi.org/10.1016/j.snb.2017.09.090
State	Published - Feb 2018

Keywords

Cysteine detection
Mercury(II) colorimetric sensor
Pyrimidine

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10.1016/j.snb.2017.09.090

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title = "A dual sensor selective for Hg2+ and cysteine detection",

abstract = "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 μM. 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 μM.",

keywords = "Cysteine detection, Mercury(II) colorimetric sensor, Pyrimidine",

author = "Jung, \{Jae Min\} and Cheal Kim and Harrison, \{Roger G.\}",

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year = "2018",

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doi = "10.1016/j.snb.2017.09.090",

language = "English",

volume = "255",

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T1 - A dual sensor selective for Hg2+ and cysteine detection

AU - Jung, Jae Min

AU - Kim, Cheal

AU - Harrison, Roger G.

PY - 2018/2

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N2 - 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 μM. 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 μM.

AB - 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 μM. 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 μM.

KW - Cysteine detection

KW - Mercury(II) colorimetric sensor

KW - Pyrimidine

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DO - 10.1016/j.snb.2017.09.090

M3 - Article

AN - SCOPUS:85030453591

SN - 0925-4005

VL - 255

SP - 2756

EP - 2763

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

ER -

A dual sensor selective for Hg²⁺ and cysteine detection

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Keywords

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