Hydrogen adsorption of some new Mercury(II)-benzotriazole dithiocarbamate mixed ligand complexes: kinetic studies

Preparation of series of new Mercury (II) mixed ligand complexes of benzotriazol dithiocarbamate (DTC) [Hg(DTC) 2 ] and phosphine or amine ligands of the type [Hg(DTC) 2 (diphosphine)] ( 2–5 ), [(Hg(DTC) 2 (diamine)]( 6,7 ), [Hg(DTC) 2 (SPPh 3 ) 2 ] ( 8 ) and [Hg(DTC) 2 (PPh 3 ) 2 ] ( 9 ) has been done. This preparation has yielded good amount of these complexes. These complexes were fully characterized by elemental analysis, conductivity measurements and spectroscopic data (FTIR, 1 H, 31 P-{1H} NMR. Three as–prepared complexes were used for hydrogen storage at a pressure range of 0–100 bar at 77 K. The results prove that the complex [Hg(DTC) 2 (dppf)] has the ability to store 3.7 wt.% at 77 K under 90 bar and the storage was started under only 20 bar (0.22 wt.%). The kinetic studies on the hydrogen storage in this complex were conducted and the results prove that the storage was conducted in 60 s only and the adsorption is fitted to the second pseudo order with R 2 = 0.99.