TY - JOUR
T1 - Spin polarization in infinite zigzag chains of [Rh2(HNCOCH 3)4Cl]n
AU - Yamauchi, Miho
AU - Koudriavtsev, Andrei B.
AU - Ikeda, Ryuichi
AU - Yang, Zhiong
AU - Kawamura, Takashi
PY - 2002
Y1 - 2002
N2 - A temperature dependence of 13C CPMAS NMR was measured for revealing the local electron spin structure in [Rh2(acam) 4Cl]n (Hacam=acetamide), Observed two sharp peaks were assigned to carbons of crystallographycally nonequivalent CH3 groups and a broad one to C in the C=O group. A large high-field shift of -125 ppm was observed in C (C=O), indicating a negative spin polarization on this carbon. From the temperature dependence of Fermi contact shifts, the hyperfine coupling constant of each carbon was determined. By considering hyperfine coupling constants, it is found that a marked amount of electron spins are distributed on C (C=O) with the negative polarization, and a small positive spin exists even on the terminal carbons in methyl groups. 1H MAS NMR spectra can be explained by the superposition of different shift lines, implying that spin polarization is also generated on hydrogen atoms.
AB - A temperature dependence of 13C CPMAS NMR was measured for revealing the local electron spin structure in [Rh2(acam) 4Cl]n (Hacam=acetamide), Observed two sharp peaks were assigned to carbons of crystallographycally nonequivalent CH3 groups and a broad one to C in the C=O group. A large high-field shift of -125 ppm was observed in C (C=O), indicating a negative spin polarization on this carbon. From the temperature dependence of Fermi contact shifts, the hyperfine coupling constant of each carbon was determined. By considering hyperfine coupling constants, it is found that a marked amount of electron spins are distributed on C (C=O) with the negative polarization, and a small positive spin exists even on the terminal carbons in methyl groups. 1H MAS NMR spectra can be explained by the superposition of different shift lines, implying that spin polarization is also generated on hydrogen atoms.
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U2 - 10.1080/713738627
DO - 10.1080/713738627
M3 - Article
AN - SCOPUS:3142554544
SN - 1058-725X
VL - 379
SP - 321
EP - 326
JO - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
ER -