[en] Full text: Hydrogen storage is as one of the major challenges for hydrogen fuel cell mobile applications. In trying to solve this technological problem, several materials have been reported as potential hydrogen storage device such as complex metal hydrides, carbon nanotubes and some porous materials like zeolites and metal-organic frameworks (MOFs) [1] . Here we report the synthesis and characterization of a new MOF M(Fum)_n (Dazb)_m .xH₂O (where M= Zn⁺ 2 or Cu⁺ 2 , Fum = fumaric acid and Dazb = 1,4-diazabicyclo[2.2.2]octane). The Thermogravimetric Analysis of Zn(Fum)_n (Dazb)_m.xH₂O showed loss of moisture within 387°C (3%), from 442°C observes the mismatch structure and disintegration of mass loss of approximately 50%. In 465°C see the last event and the formation of zinc oxide which corresponds 4,4%. For the Cu(Fum)_n (Dazb)_m.xH₂O, there is output to the hydration water 220°C (~6%), followed by decomposition of the organic part of the range of 220-320°C (~54%) e the formation of copper oxide 330°C (~4%)The XRD shows high crystallinity, purity and isoestructure for materials developed with Zn e Cu. It is reported a single phase with intense peaks at 12,6; 14,0; 30,0; e 40,3° = 2θ. The Scanning Electron Microscopy showed regular spherical morphology. References [1]. Longo, M. A. V., Lazzarin N., Miguez T. A., Biological Hydrogen Production, 2008. (author)