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DFT study of dihydrogen interactions with lithium containing organic complexes C4H4-mLim and C5H5-mLim (m = 1, 2) |
Hong ZHANG1( ), Xiao-dong LI1, Yong-jian TANG2 |
| 1. College of Physical Science and Technology, Sichuan University, Chengdu 610065, China; 2. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China |
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Abstract The interactions of dihydrogen with lithium containing organic complexes C4H4-mLim and C5H5-mLim (m = 1, 2) were studied by means of density functional theory (DFT) calculation. For all the complexes considered, each bonded lithium atom can adsorb up to five H2 molecules with the mean binding energy of 0.59 eV/H2 molecule. The interactions can be attributed to the charge transfer from the H2 bonding orbitals to the Li 2s orbitals. The kinetic stability of these hydrogen-covered organolithium molecules is discussed in terms of the energy gap between the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO). The results indicate that these organiclithium structures can perhaps be used as building units for potential hydrogen storage materials.
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| Keywords
adsorption
density functional calculations
organolithium molecule
hydrogen storage
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Corresponding Author(s):
ZHANG Hong,Email:hongzhang@scu.edu.cn
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Issue Date: 05 June 2011
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