Vol. 3 No. 2 (2011), SECTION A: EXACT SCIENCES
Vol. 3 No. 2 (2011)

Computational study B3LYP interaction of molecular hydrogen [H2] with rccc R-Pyg [4]arenes [R = methyl, fluoride] functionalized with Li+

SECTION A: EXACT SCIENCES
Andrés S. Urbina
Universidad San Francisco de Quito
Andrea A. Saltos
Universidad San Francisco de Quito
Fernando Javier Torres
Universidad San Francisco de Quito
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Keywords

Hydrogen storage
pyrogallol
DFT
sorption capacity

How to Cite

Urbina, A. S., Saltos, A. A., & Torres, F. J. (2011). Computational study B3LYP interaction of molecular hydrogen [H2] with rccc R-Pyg [4]arenes [R = methyl, fluoride] functionalized with Li+. ACI Avances En Ciencias E Ingenierías, 3(2). https://doi.org/10.18272/aci.v3i2.66
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Abstract

The interaction of molecular hydrogen [H2] with methyl- and fluoride-substituted rccc pirogallol[4]arenes functionalized with Li+ cations [Li-R-Pyg[4]Ar] was theoretically studied by means of DFT quantum-mechanical calculations at the B3LYP/6-311G (d,p) level of theory. In a first stage of the study, the stability of the Li+ cation within the cavity of the R-Pyg[4]arenes was analyzed by inspecting the local environment of the adsorbed ion and the total density as well as the electrostatic potential maps of the complexes. In a subsequent stage of the work, the optimal position of a H2 molecule in the cavity of the pure and lithium-functionalized R-Pyg[4]arenes was determined. Upon obtaining the equilibrium geometry, the BSSE-corrected binding energy of the various H2/R-Pyg[4]Ar complexes was calculated. The results showed that the sorption capacity of R-Pyg[4]arenes is significantly improved by the presence of the Li+ cation within their cavity.

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