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. 2022 Mar 29;27(7):2226. doi: 10.3390/molecules27072226

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(a) The post-synthesis process of UiO-66-MA. (b) Fluorescence titration of UiO-66-MA with H₂S (0-0.625 μM); inset: images of UiO-66-MA under day light (up) and UV light (down, 365 nm) in the presence of 0, 0.04, 0.08, 0.125, 0.165, 0.25, 0.35, and 0.625 μM of H₂S for 1–8, respectively. (c) Fluorescence titration of UiO-66-MA/H₂S with growing concentration of Cu²⁺; inset: images of UiO-66-MA/H₂S under day light (up) and UV light (365 nm, down) in the presence of 0, 0.02, 0.07, 0.12, 0.17, 0.22, and 0.35 μM of Cu²⁺ for 0–6, respectively. (d) A possible tandem process in view of the Michael addition, and S-Cu integration was calculated by DFT. Adapted from [48].