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

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 similar to 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 similar to 312 degrees 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 degrees C and H-2-pressure of similar to 22 bar. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study introduces a simple strategy to synthesize a non-crystalline porous 2D-flakes of Mg(II)-methyl 3,5-dinitro-salicylate complex with a large BET surface area of approximately 788 m^2g^-1 through microwave assisted hydro-complexation. The proposed structure was confirmed through structure visualization and density functional theory calculations, showing good thermal stability and hydrogen loading performance of the produced Mg-complex.