Articles producció científica> Química Física i Inorgànica

On the role of dynamic electron correlation in non-orthogonal configuration interaction with fragments

  • Identification data

    Identifier: imarina:9262314
    Authors:
    Sanchez-Mansilla, A.Sousa, C.Kathir, R. K.Broer, R.Straatsma, T. P.de Graaf, C.
    Abstract:
    Two different approaches have been implemented to include the effect of dynamic electron correlation in the Non-Orthogonal Configuration Interaction for Fragments (NOCI-F) method. The first is based on shifting the diagonal matrix elements of the NOCI matrix, while the second incorporates the dynamic correlation explicitly in the fragment wave functions used to construct the many-electron basis functions of the NOCI. The two approaches are illustrated for the calculation of the electronic coupling relevant in singlet fission and the coupling of spin moments in organic radicals. Comparison of the calculated diabatic couplings, the NOCI energies and wave functions shows that dynamic electron correlation is not only efficiently but also effectively incorporated by the shifting approach and can largely affect the coupling between electronic states. Also, it brings the NOCI coupling of the spin moments in close agreement with benchmark calculations.
  • Others:

    Author, as appears in the article.: Sanchez-Mansilla, A.; Sousa, C.; Kathir, R. K.; Broer, R.; Straatsma, T. P.; de Graaf, C.;
    Department: Química Física i Inorgànica
    URV's Author/s: De Graaf, Cornelis / Sánchez Mansilla, Aitor María
    Keywords: Spin transitions Open-shell Implementation Hole states Hamiltonians Excitations Energy differences Broken orbital-symmetry Binuclear complexes 2nd-order perturbation-theory
    Abstract: Two different approaches have been implemented to include the effect of dynamic electron correlation in the Non-Orthogonal Configuration Interaction for Fragments (NOCI-F) method. The first is based on shifting the diagonal matrix elements of the NOCI matrix, while the second incorporates the dynamic correlation explicitly in the fragment wave functions used to construct the many-electron basis functions of the NOCI. The two approaches are illustrated for the calculation of the electronic coupling relevant in singlet fission and the coupling of spin moments in organic radicals. Comparison of the calculated diabatic couplings, the NOCI energies and wave functions shows that dynamic electron correlation is not only efficiently but also effectively incorporated by the shifting approach and can largely affect the coupling between electronic states. Also, it brings the NOCI coupling of the spin moments in close agreement with benchmark calculations.
    Thematic Areas: Química Physics, atomic, molecular & chemical Physics and astronomy (miscellaneous) Physics and astronomy (all) Physical and theoretical chemistry Odontología Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Interdisciplinar Geociências General physics and astronomy General medicine Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, physical Biotecnología Biodiversidade Astronomia / física
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    Author's mail: coen.degraaf@urv.cat aitor.sanchezm@estudiants.urv.cat
    Author identifier: 0000-0001-8114-6658
    Record's date: 2024-09-07
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://pubs.rsc.org/en/content/articlelanding/2022/cp/d2cp00772j
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Papper original source: Physical Chemistry Chemical Physics. 24 (19): 11931-11944
    APA: Sanchez-Mansilla, A.; Sousa, C.; Kathir, R. K.; Broer, R.; Straatsma, T. P.; de Graaf, C.; (2022). On the role of dynamic electron correlation in non-orthogonal configuration interaction with fragments. Physical Chemistry Chemical Physics, 24(19), 11931-11944. DOI: 10.1039/d2cp00772j
    Article's DOI: 10.1039/d2cp00772j
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2022
    Publication Type: Journal Publications
  • Keywords:

    Chemistry, Physical,Physical and Theoretical Chemistry,Physics and Astronomy (Miscellaneous),Physics, Atomic, Molecular & Chemical
    Spin transitions
    Open-shell
    Implementation
    Hole states
    Hamiltonians
    Excitations
    Energy differences
    Broken orbital-symmetry
    Binuclear complexes
    2nd-order perturbation-theory
    Química
    Physics, atomic, molecular & chemical
    Physics and astronomy (miscellaneous)
    Physics and astronomy (all)
    Physical and theoretical chemistry
    Odontología
    Medicina ii
    Medicina i
    Materiais
    Matemática / probabilidade e estatística
    Interdisciplinar
    Geociências
    General physics and astronomy
    General medicine
    Farmacia
    Ensino
    Engenharias iv
    Engenharias iii
    Engenharias ii
    Ciências biológicas ii
    Ciências biológicas i
    Ciências ambientais
    Ciências agrárias i
    Ciência de alimentos
    Ciência da computação
    Chemistry, physical
    Biotecnología
    Biodiversidade
    Astronomia / física
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