Modification of spin crossover behavior through solvent assisted formation and solvent inclusion in a triply interpenetrating three-dimensional network

Matthias Bartel, Alina Absmeier, Guy N.L. Jameson, Franz Werner, Kenichi Kato, Masaki Takata, Roman Boca, Miki Hasegawa, Kurt Mereiter, Andrea Caneschi, Wolfgang Linert

研究成果: Article査読

43 被引用数 (Scopus)

抄録

The 3D coordination polymer [Fe(4ditz)3](PF6) 2·Solv consists of three interpenetrating infinite networks. There are cavities between iron atoms of different networks, which are partly filled with solvent molecules. With a change of the solvent used during synthesis from methanol to ethanol, the magnetic behavior of the materials changes. Both show an abrupt two-step spin crossover from low spin (S = 0) to high spin (S = 2) with the methanolate curve lying 7 K higher and showing a small hysteresis. Single crystal and powder diffraction studies show that they both have the same structure, but in powder form, the methanolate slowly loses methanol to finally leave about 0.075 MeOH/Fe. In comparison, the bigger ethanol remains at 0.25 EtOH/Fe. These results, in conjunction with thermodynamic data, strongly suggest that the differences in magnetic behavior are largely entropic in nature. Possible reasons for this are discussed.

本文言語English
ページ(範囲)4220-4229
ページ数10
ジャーナルInorganic chemistry
46
10
DOI
出版ステータスPublished - 2007 5 14
外部発表はい

ASJC Scopus subject areas

  • 物理化学および理論化学
  • 無機化学

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