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Four novel TPDCA derivatives were prepared via a supersaturation method combining TPDCA with water, N-methyl-2-pyrrolidone (NMP), Na(PO₂H₂), and ammonia solution: 2(C₉H₇NO₅S)H₂O (1), (C₉H₇NO₅S)C₅H₉NO (2), (C₉H₇NO₅S)Na(PO₂H₂) (3), and (C₉H₅NO₅S)(NH₄)2(H₂O) (4). Their crystal structures were determined by single-crystal X-ray diffraction. Compounds (1) and (2) crystallize in the monoclinic space groups P2₁ and P2₁/c, respectively, whereas compounds (3) and (4) crystallize in the triclinic space group P1^-. Weak and moderate hydrogen bonds were detected in the four compounds. In the biological tests, (1) and (3) exhibited significant antibacterial activity against Escherichia coli and Staphylococcus aureus; in addition, (1) was cytotoxic against leukemia HL-60more » cells with the IC₅₀ value of 158.5 ± 12.5 μM.« less

We report on the successful synthesis of diammonium magnesium dihydrogendiphosphate (V) dihydrate compound (NH₄)₂Mg(H₂P₂O₇)₂•2H₂O using a wet chemical route. Single crystal X-ray diffraction analysis and micro Raman spectroscopy are employed to characterize the compound. We demonstrate, using a multidisciplinary approach, that this compound is ideal for carbon dioxide (CO₂) capture in addition to other anthropogenic gasses. We show here -from both an experimental as well as from a density functional theory (DFT) calculations routes- the potential for adopting this compound into domestic air-conditioning units (ACUs). From these experiments, the resistance to bacterial growth is also investigated, which is critical formore » the adoption of this compound in ACUs. Our compound exhibits a higher methane (CH₄) sorptivity as compared to CO₂ at 25 °C and 45 °C under pressures up to 50 bars. Furthermore, DFT electronic structure calculations are used to compute the main structural and electronic properties of the compound, taking into consideration the characteristics of the identified pores as a function of the progressive CO₂ vs. CH₄ loadings. Finally, the antibacterial assay reveals a strong antibacterial activity against the tested Gram-positive and Gram-negative bacteria, with a large zone of inhibition against the tested E. Coli, S. Aureus and K. Pneumonia« less