Thiol-containing chemosensor MPT was prepared and used to relay recognition of Cu2+ and S2-. Addition of Cu2+ to MPT induced the obvious appearance of a red-shifted absorption with a color change of 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 of 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 understood by various spectroscopic techniques and DFT calculations.

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

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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