Angle-selective measurements of spin soliton in ladder polydiacetylene by pulsed 94 GHz EPR

Tadaaki Ikoma, S. Okada, S. Tero-Kubota, H. Nakanishi, T. Kato, P. Höfer, A. Kamlowski, K. Akiyama

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1 Citation (Scopus)


Angle-selection experiments of a spin soliton in randomly oriented ladder polydiacetylene were carried out by pulsed electron paramagnetic resonance (EPR) at W-band. EPR measurement using 94 GHz microwaves increased the difference in the resonance field due to g anisotropy of the spin soliton to allow the orientation dependence of transient nutation, electron nuclear double resonance (ENDOR) and spin relaxations to be investigated. The shape of the g anisotropy-resolved nutation spectrum was discussed on the basis of the EPR transition moments and the differences between spin relaxation times. Reliable assignments of hyperfine couplings to the β protons (Hβ) of the alkyl side chains were achieved with the support of W-band ENDOR measurements. No significant orientational dependence in the T1 and T2 processes was found in terms of isotropy of the Hβ-hyperfine interaction.

Original languageEnglish
Pages (from-to)445-453
Number of pages9
JournalApplied Magnetic Resonance
Issue number3-4
Publication statusPublished - 2003 Jan 1

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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