| Abstract |
Based on Schiff base chemistry, crosslinked porous organic aminal networks were prepared using acetic acid as a catalyst. These Schiff base networks (SNWs) are polymeric materials based on melamine and 5,5 -methylene-bis-salicylaldehyde, with nitrogen contents as high as ca. 36 wt.\%, which were characterized by FTIR spectroscopy, elemental analysis, and C-13 and (15) N solid-state NMR spectroscopies. A series of polymer networks with different monomeric molar ratios and different amounts of added catalyst were explored, in order to study their effect on the final polymer structure, porosity and H-2 storage capacity. These materials exhibit Brunauer-Emmett-Teller (BET) surface areas up to ca. 526 m(2)/g, as measured by N-2 adsorption at 77 K, and exhibit gravimetric storage capacities up to 2.57 wt.\% at 20 bar and 77 K. |
