A novel selective colorimetric chemosensor for cobalt ions in a near perfect aqueous solution

Yu Jeong Na; Ye Won Choi; Ga Rim You; Cheal Kim

doi:10.1016/j.snb.2015.09.098

A novel selective colorimetric chemosensor for cobalt ions in a near perfect aqueous solution

Yu Jeong Na, Ye Won Choi, Ga Rim You, Cheal Kim

Dept. of Fine Chemistry

Seoul National University of Science and Technology (SNUST)

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

70 Scopus citations

Abstract

A novel chemosensor 1 (1 = 2-(N-(2-hydroxybenzyl)-N-((pyridin-2-yl)methyl)amino)-N-(2-hydroxyphenyl)acetamide) was synthesized and characterized. The receptor 1 showed a selective colorimetric sensing ability for cobalt ion by changing color from colorless to pale violet in a near perfect aqueous solution, facilitating naked eye detection of Co³⁺ through the oxidation of Co²⁺ to Co³⁺. This phenomenon could be possibly explained by ligand-to-metal charge-transfer. Moreover, the detection limit (1.8 μM) of 1-Co complex is comparable to the environmental protection agency (EPA) guideline (1.7 μM) in drinking water. Practically, 1 also functioned when supported by silica, indicating that receptor 1 had the potential for working as optical solid sensors.

Original language	English
Pages (from-to)	234-240
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	223
DOIs	https://doi.org/10.1016/j.snb.2015.09.098
State	Published - 1 Feb 2016

Keywords

Cobalt ion
Colorimetric chemosensor
LMCT
Solid sensor

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10.1016/j.snb.2015.09.098

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title = "A novel selective colorimetric chemosensor for cobalt ions in a near perfect aqueous solution",

abstract = "A novel chemosensor 1 (1 = 2-(N-(2-hydroxybenzyl)-N-((pyridin-2-yl)methyl)amino)-N-(2-hydroxyphenyl)acetamide) was synthesized and characterized. The receptor 1 showed a selective colorimetric sensing ability for cobalt ion by changing color from colorless to pale violet in a near perfect aqueous solution, facilitating naked eye detection of Co3+ through the oxidation of Co2+ to Co3+. This phenomenon could be possibly explained by ligand-to-metal charge-transfer. Moreover, the detection limit (1.8 μM) of 1-Co complex is comparable to the environmental protection agency (EPA) guideline (1.7 μM) in drinking water. Practically, 1 also functioned when supported by silica, indicating that receptor 1 had the potential for working as optical solid sensors.",

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author = "Na, \{Yu Jeong\} and Choi, \{Ye Won\} and You, \{Ga Rim\} and Cheal Kim",

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T1 - A novel selective colorimetric chemosensor for cobalt ions in a near perfect aqueous solution

AU - Na, Yu Jeong

AU - Choi, Ye Won

AU - You, Ga Rim

AU - Kim, Cheal

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N2 - A novel chemosensor 1 (1 = 2-(N-(2-hydroxybenzyl)-N-((pyridin-2-yl)methyl)amino)-N-(2-hydroxyphenyl)acetamide) was synthesized and characterized. The receptor 1 showed a selective colorimetric sensing ability for cobalt ion by changing color from colorless to pale violet in a near perfect aqueous solution, facilitating naked eye detection of Co3+ through the oxidation of Co2+ to Co3+. This phenomenon could be possibly explained by ligand-to-metal charge-transfer. Moreover, the detection limit (1.8 μM) of 1-Co complex is comparable to the environmental protection agency (EPA) guideline (1.7 μM) in drinking water. Practically, 1 also functioned when supported by silica, indicating that receptor 1 had the potential for working as optical solid sensors.

AB - A novel chemosensor 1 (1 = 2-(N-(2-hydroxybenzyl)-N-((pyridin-2-yl)methyl)amino)-N-(2-hydroxyphenyl)acetamide) was synthesized and characterized. The receptor 1 showed a selective colorimetric sensing ability for cobalt ion by changing color from colorless to pale violet in a near perfect aqueous solution, facilitating naked eye detection of Co3+ through the oxidation of Co2+ to Co3+. This phenomenon could be possibly explained by ligand-to-metal charge-transfer. Moreover, the detection limit (1.8 μM) of 1-Co complex is comparable to the environmental protection agency (EPA) guideline (1.7 μM) in drinking water. Practically, 1 also functioned when supported by silica, indicating that receptor 1 had the potential for working as optical solid sensors.

KW - Cobalt ion

KW - Colorimetric chemosensor

KW - LMCT

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A novel selective colorimetric chemosensor for cobalt ions in a near perfect aqueous solution

Abstract

Keywords

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