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Synthesis of newly non-crystalline-porous- 2D-flakes- Mg(II) -methyl 3, 5-dinitro-salicylate complex for hydrogen storage

Journal of Molecular Structure, ISSN: 0022-2860, Vol: 1238, Page: 130415
2021
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The present investigations are introducing simple strategy to synthesis a non-crystalline porous-2D-flakes of Mg(II)- methyl 3,5-dinitro-salicylate complex with large BET-surface area of ~788 m 2 g −1 via microwave assisted hydro-complexation. Structure visualization coupled with some of density function theory (DFT)-calculations are supported the proposal in which, Mg-ions are tetra-coordinated with two ligands of methyl 3, 5-dinitrosalicylate through four-oxygen-donor atoms with molar ratios of 1:2 as confirmed in structural analyses and other theoretical treatments. The produced Mg(II) -complex was characterized by micro-elemental analysis (C, H, N, O, M), Raman spectra, PXRD, TGA/DTA thermal analyses and Uv-Vis spectra. The produced 2D-flakes of Mg-complex is thermally stable and has melting point of ~312 °C, which is relatively high due to presence hydrogen bonding that, stabilize 2D-Mg-complex formation. Furthermore, ligands containing nitro-groups promote hydrogen loading (uptake) of Mg-complex through amino-formation, recording 4.7 wt% at 290 °C and H 2 -pressure of ~ 22 bar.

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