Spin polarization in infinite zigzag chains of [Rh2(HNCOCH 3)4Cl]n

Miho Yamauchi, Andrei B. Koudriavtsev, Ryuichi Ikeda, Zhiong Yang, Takashi Kawamura

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)321-326
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume379
DOIs
Publication statusPublished - 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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