Electron paramagnetic resonance of the excited states of the three-spins-1/2 ZnTPP-3-NOPy complex

V. F. Tarasov, I. S.M. Saiful, Y. Ohba, K. Takahashi, S. Yamauchi

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

EPR spectra of the excited quartet and doublet molecular states of (tetraphenylporphinato)zinc(II)covalently bounded to 3-(N-nitronyl-notroxide) pyridine stable radical are modeled in terms of the spin-Hamiltonian given by the sum of the contributions from the radical and triplet moieties, and the interaction between them. The later is represented by anisotropic point dipolar and isotropic exchange electron spin-spin interactions. It is shown that the high field (W-band) EPR spectra depend on energy separation between the electronic doublet (D) and quartet (Q) states. This dependence was utilized to estimate the upper limit of the intensity of exchange interaction between the radical and porphyrin moieties.

Original languageEnglish
Pages (from-to)1327-1330
Number of pages4
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume69
Issue number5
DOIs
Publication statusPublished - 2008 May 1

Keywords

  • Electron spin polarization
  • Exchange interaction
  • Multi-spin excited molecular states
  • Nitroxide radical
  • Porphyrin

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

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