Figure 5.

(a) Simulated cubic framework structure of DUT-52-NHCOCF₃ MOF (1) in a ball and stick model. The C, O, N, and F atoms are shown as gray, red, blue, and aquamarine-colored balls, respectively. The Zr clusters are displayed as yellow polyhedra. (b) Possible mechanisms of CN− sensing. (c) Fluorescence turn-on response of the sensor with different anions in water [75]. Reproduced with permission from Gogoi, C., Inorg. Chem., published by 2021 American Chemical Society, 2021. (d) Luminescent 2D Metal−Organic Framework Nanosheets (MONs). (e) Fluorescence intensities of 2D MON in the presence of various anionic analytes (orange). 2D-MONs containing H₂PO₄⁻ in the presence of other anions (blue). (f) Schematic drawing of the structure of the zwitterionic linker and plausible binding of H₂PO₄⁻ [76]. Reproduced with permission from Jindal, S., Inorg. Chem., published by 2022 American Chemical Society, 2022.