Ferromagnetic coupling through m-phenylene. Molecular and crystal orbital study

Kazunari Yoshizawa, Kazuyoshi Tanaka, Tokio Yamabe

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

As a study of organic ferromagnetism in a one-dimensional system, magnetic interaction between radical centers through a m-phenylene coupling unit is considered on the basis of the molecular orbital (MO) and the crystal orbital (CO) methods. The semiempirical MO calculations for dimer models show that the exchange integral between radical centers such as C-H, N, N•+-H, and N-O through the m-phenylene coupling unit is positive both in the unrestricted Hartree-Fock (UHF) approach and in the configuration interaction (CI) approach. Although the UHF and the CI methods predicted quite similar triplet geometries, the UHF method was found to overestimate the preference for the triplet states. Moreover, the CO calculations with the UHF method gave a theoretical background for the realization of a ground state with macroscopic spin alignment on the one-dimensional model chains.

Original languageEnglish
Pages (from-to)1851-1855
Number of pages5
JournalJournal of Physical Chemistry
Volume98
Issue number7
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes

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Orbital calculations
Molecular orbitals
configuration interaction
molecular orbitals
orbitals
Crystals
Ferromagnetism
Dimers
Ground state
ferromagnetism
atomic energy levels
crystals
alignment
dimers
ground state
Geometry
geometry
interactions

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Ferromagnetic coupling through m-phenylene. Molecular and crystal orbital study. / Yoshizawa, Kazunari; Tanaka, Kazuyoshi; Yamabe, Tokio.

In: Journal of Physical Chemistry, Vol. 98, No. 7, 01.01.1994, p. 1851-1855.

Research output: Contribution to journalArticle

Yoshizawa, Kazunari ; Tanaka, Kazuyoshi ; Yamabe, Tokio. / Ferromagnetic coupling through m-phenylene. Molecular and crystal orbital study. In: Journal of Physical Chemistry. 1994 ; Vol. 98, No. 7. pp. 1851-1855.
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