Charge Transfer in Partition Theory

Abstract

The recently proposed Partition Theory (PT) [J.Phys.Chem.A 111, 2229 (2007)] is illustrated on a simple one-dimensional model of a heteronuclear diatomic molecule. It is shown that a sharp definition for the charge of molecular fragments emerges from PT, and that the ensuing population analysis can be used to study how charge redistributes during dissociation and the implications of that redistribution for the dipole moment. Interpreting small differences between the isolated parts' ionization potentials as due to environmental inhomogeneities, we gain insight into how electron localization takes place in H2+ as the molecule dissociates. Furthermore, by studying the preservation of the shapes of the parts as different parameters of the model are varied, we address the issue of transferability of the parts. We find good transferability within the chemically meaningful parameter regime, raising hopes that PT will prove useful in chemical applications.

12 pages, 16 figures

References in corpus (2)

• Partition theory: A very simple illustration
• Dissociation and ionization of small molecules steered by external noise

Cited by in corpus (5)

• Partition Density Functional Theory
• On the Subsystem Formulation of Linear-Response Time-Dependent DFT
• Semilocal and Hybrid Density Embedding Calculations of Ground-State Charge-Transfer Complexes
• Split Electrons in Partition Density Functional Theory
• Exact partition potential for model systems of interacting electrons in 1-D