A thiol-containing colorimetric chemosensor for relay recognition of Cu2+ and S2− in aqueous media with a low detection limit

Haeri So; Ju Byeong Chae; Cheal Kim

doi:10.1016/j.ica.2019.04.024

A thiol-containing colorimetric chemosensor for relay recognition of Cu²⁺ and S²⁻ in aqueous media with a low detection limit

Haeri So, Ju Byeong Chae, Cheal Kim

Dept. of Fine Chemistry

Seoul National University of Science and Technology (SNUST)

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

38 Scopus citations

Abstract

A thiol-containing chemosensor MPT was prepared and used to relay recognition of Cu²⁺ and S²⁻. Addition of Cu²⁺ to MPT caused the obvious appearance of a red-shifted absorption with a color change from colorless to pale yellow. MPT for detecting Cu²⁺ could be used in real samples and test strips. Sequentially, MPT-Cu²⁺ recognized S²⁻ through the appearance of a blue-shifted absorption with a color change from pale yellow to colorless. Detection limits for copper(II) ion and sulfide turned out to be 0.11 μM and 0.23 μM, which were significantly below WHO standards (31.4 μM for Cu²⁺ and 14.8 μM for S²⁻) for drinking water. The binding processes of MPT toward copper(II) ion and sulfide were demonstrated by UV-visible, ESI-mass, FT-IR and ¹H NMR titrations, and understood by DFT calculations.

Original language	English
Pages (from-to)	83-90
Number of pages	8
Journal	Inorganica Chimica Acta
Volume	492
DOIs	https://doi.org/10.1016/j.ica.2019.04.024
State	Published - 24 Jun 2019

Keywords

Colorimetric chemosensor
Cu
S
Test strips
Thiol
Water samples

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10.1016/j.ica.2019.04.024

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@article{e45375b277f64bbaa4327aa1eeff5225,

title = "A thiol-containing colorimetric chemosensor for relay recognition of Cu2+ and S2− in aqueous media with a low detection limit",

abstract = "A thiol-containing chemosensor MPT was prepared and used to relay recognition of Cu2+ and S2−. Addition of Cu2+ to MPT caused the obvious appearance of a red-shifted absorption with a color change from colorless to pale yellow. MPT for detecting Cu2+ could be used in real samples and test strips. Sequentially, MPT-Cu2+ recognized S2− through the appearance of a blue-shifted absorption with a color change from pale yellow to colorless. Detection limits for copper(II) ion and sulfide turned out to be 0.11 μM and 0.23 μM, which were significantly below WHO standards (31.4 μM for Cu2+ and 14.8 μM for S2−) for drinking water. The binding processes of MPT toward copper(II) ion and sulfide were demonstrated by UV-visible, ESI-mass, FT-IR and 1H NMR titrations, and understood by DFT calculations.",

keywords = "Colorimetric chemosensor, Cu, S, Test strips, Thiol, Water samples",

author = "Haeri So and Chae, \{Ju Byeong\} and Cheal Kim",

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year = "2019",

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doi = "10.1016/j.ica.2019.04.024",

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T1 - A thiol-containing colorimetric chemosensor for relay recognition of Cu2+ and S2− in aqueous media with a low detection limit

AU - So, Haeri

AU - Chae, Ju Byeong

AU - Kim, Cheal

PY - 2019/6/24

Y1 - 2019/6/24

N2 - A thiol-containing chemosensor MPT was prepared and used to relay recognition of Cu2+ and S2−. Addition of Cu2+ to MPT caused the obvious appearance of a red-shifted absorption with a color change from colorless to pale yellow. MPT for detecting Cu2+ could be used in real samples and test strips. Sequentially, MPT-Cu2+ recognized S2− through the appearance of a blue-shifted absorption with a color change from pale yellow to colorless. Detection limits for copper(II) ion and sulfide turned out to be 0.11 μM and 0.23 μM, which were significantly below WHO standards (31.4 μM for Cu2+ and 14.8 μM for S2−) for drinking water. The binding processes of MPT toward copper(II) ion and sulfide were demonstrated by UV-visible, ESI-mass, FT-IR and 1H NMR titrations, and understood by DFT calculations.

AB - A thiol-containing chemosensor MPT was prepared and used to relay recognition of Cu2+ and S2−. Addition of Cu2+ to MPT caused the obvious appearance of a red-shifted absorption with a color change from colorless to pale yellow. MPT for detecting Cu2+ could be used in real samples and test strips. Sequentially, MPT-Cu2+ recognized S2− through the appearance of a blue-shifted absorption with a color change from pale yellow to colorless. Detection limits for copper(II) ion and sulfide turned out to be 0.11 μM and 0.23 μM, which were significantly below WHO standards (31.4 μM for Cu2+ and 14.8 μM for S2−) for drinking water. The binding processes of MPT toward copper(II) ion and sulfide were demonstrated by UV-visible, ESI-mass, FT-IR and 1H NMR titrations, and understood by DFT calculations.

KW - Colorimetric chemosensor

KW - Cu

KW - S

KW - Test strips

KW - Thiol

KW - Water samples

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DO - 10.1016/j.ica.2019.04.024

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SN - 0020-1693

VL - 492

SP - 83

EP - 90

JO - Inorganica Chimica Acta

JF - Inorganica Chimica Acta

ER -

A thiol-containing colorimetric chemosensor for relay recognition of Cu²⁺ and S²⁻ in aqueous media with a low detection limit

Abstract

Keywords

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