On the calculation of second-order magnetic properties using subsystem approaches in a relativistic framework

文献信息

发布日期 2017-02-17

DOI 10.1039/C6CP08561J

影响因子 3.676

作者

Małgorzata Olejniczak, Radovan Bast, André Severo Pereira Gomes

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摘要

We report an implementation of nuclear magnetic resonance (NMR) shielding (σ), isotope-independent indirect spin–spin coupling (K) and the magnetizability (ξ) tensors in a frozen density embedding scheme using the four-component (4c) relativistic Dirac–Coulomb (DC) Hamiltonian and non-collinear spin density functional theory. The formalism takes into account the magnetic balance between the large and the small components of molecular spinors and assures the gauge-origin independence of the NMR shielding and magnetizability results. This implementation has been applied to hydrogen-bonded HXH⋯OH2 complexes (X = Se, Te, Po) and compared with supermolecular calculations and with an approach based on the integration of the magnetically induced current density vector. A comparison with the approximate zeroth-order regular approximation (ZORA) Hamiltonian indicates non-negligible differences in σ and K in the HPoH⋯OH2 complex, and calls for a thorough comparison of ZORA and DC Hamiltonians in the description of environment effects on NMR parameters for molecular systems with heavy elements.

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来源期刊

Physical Chemistry Chemical Physics

CiteScore: 5.5

自引率: 10.3%

年发文量: 3036

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