期刊
CHEMICAL PHYSICS LETTERS
卷 449, 期 1-3, 页码 144-148出版社
ELSEVIER
DOI: 10.1016/j.cplett.2007.10.063
关键词
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A sequential Monte Carlo/quantum mechanics approach was used to investigate the solvent effects on d -> d transition of the Fe2+ ion in aqueous solution. A set of Lennard-Jones parameters were generated by modification of the UFF force field. The structural results obtained for the liquid structure around the Fe2+ ion are in very good agreement with the experimental findings. The water molecules in the second coordination shell interacts strongly with the first shell, with a hydrogen bond energy of -15.6 +/- 3.0 kcal/mol, which represents about 20% of the binding energy computed for the [Fe(H2O)](2+) species. The electronic spectrum was calculated within the TD-DFT approach and we show that inclusion of outer solvation shells explicitly in the calculation does not affect appreciably the d -> d transition. (c) 2007 Elsevier B.V. All rights reserved.
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