Modulation of the interlayer structures and magnetic behavior of 2D spin-crossover coordination polymers [FeII(L)2Pt II(CN)4]

Ryo Ohtani, Masashi Arai, Hisayoshi Ohba, Akihiro Hori, Masaki Takata, Susumu Kitagawa, Masaaki Ohba

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

Two 2D Hofmann-type spin-crossover coordination polymers, [Fe(stpy) 2Pt(CN) 4]·0.5MeOH (stpy = 4-styrylpyridine; 1) and [Fe(pep) 2Pt(CN) 4] {pep = 4-(2-phenylethyl)pyridine; 2}, have been prepared by using long co-ligands with different flexibilities. These compounds form 3D interdigitate structures based on 2D layers extended by Pt-CN-Fe linkages with different interlayer structures depending on the nature of the axial co-ligand. The stpy co-ligand forms one-directional π-π networks between the layers, whereas pep forms twodirectional π-π networks as a result of its perpendicularly twisted structure. Coordination polymer 1 exhibits a half-spin transition with Tc ↓ = 106 K and Tc ↑ = 110 K. In contrast, coordination polymer 2 shows a sharp, two-step spin transition in the temperature range 184-236 K. The difference in spintransition behavior is discussed in terms of the interlayer packing structure.

Original languageEnglish
Pages (from-to)738-744
Number of pages7
JournalEuropean Journal of Inorganic Chemistry
Issue number5-6
DOIs
Publication statusPublished - 2013 Feb 1
Externally publishedYes

Keywords

  • Coordination polymers
  • Cyanides
  • Iron
  • Metal-organic frameworks
  • Spin crossover

ASJC Scopus subject areas

  • Inorganic Chemistry

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