Single-molecule magnetic behavior in a neutral terbium(III) complex of a picolinate-based nitronyl nitroxide free radical

Inorg Chem. 2011 Aug 15;50(16):7370-2. doi: 10.1021/ic2010425. Epub 2011 Jul 13.

Abstract

The terdentate anionic picolinate-based nitronyl nitroxide (picNN) free radical forms neutral and robust homoleptic complexes with rare earth-metal ions. The nonacoordinated Tb(3+) complex Tb(picNN)(3)·6H(2)O is a single-molecule magnet with an activation energy barrier Δ = 22.8 ± 0.5 K and preexponential factor τ(0) = (5.5 ± 1.1) × 10(-9) s. It shows magnetic hysteresis below 1 K.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Free Radicals / chemistry
  • Iron Chelating Agents / chemistry
  • Magnetics*
  • Models, Molecular
  • Molecular Structure
  • Nitric Oxide Donors / chemistry*
  • Organometallic Compounds / chemistry*
  • Picolinic Acids / chemistry*
  • Terbium / chemistry*

Substances

  • Free Radicals
  • Iron Chelating Agents
  • Nitric Oxide Donors
  • Organometallic Compounds
  • Picolinic Acids
  • Terbium
  • picolinic acid