TY - JOUR
T1 - Electron paramagnetic resonance of the excited states of the three-spins-1/2 ZnTPP-3-NOPy complex
AU - Tarasov, V. F.
AU - Saiful, I. S.M.
AU - Ohba, Y.
AU - Takahashi, K.
AU - Yamauchi, S.
N1 - Funding Information:
This research was supported by the Russian Foundation for Basic Researches (05-03-32197-a, 06-03-91362-JF-a, and 07-03-00948-a), and the Japan Society for the Promotion of Science (Japan–Russia Joint Research Project 6037711-361).
PY - 2008/5
Y1 - 2008/5
N2 - 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.
AB - 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.
KW - Electron spin polarization
KW - Exchange interaction
KW - Multi-spin excited molecular states
KW - Nitroxide radical
KW - Porphyrin
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U2 - 10.1016/j.saa.2007.09.026
DO - 10.1016/j.saa.2007.09.026
M3 - Article
C2 - 17996490
AN - SCOPUS:42049122625
VL - 69
SP - 1327
EP - 1330
JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
SN - 1386-1425
IS - 5
ER -