Original scientific paper

https://doi.org/10.5562/cca2758

Mössbauer Spectroscopic Study on Hofmann-like Coordination Polymer Fe(4-Clpy)₂[Ni(CN)₄]

Takafumi Kitazawa ; Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
Takeshi Kawasaki ; Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
Hitomi Shiina ; Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan
Masashi Takahashi ; Department of Chemistry, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba 274-8510, Japan

Abstract

57Fe Mössbauer spectroscopic results on the 2D Hofmann-like coordination polymer Fe(4-Clpy)₂Ni(CN)₄ (sample 1) indicate that iron(II) ions are in a high spin state both at R.T. and T = 80 K, showing that the compound exhibits no spin crossover (SCO) behavior. Mössbauer spectra at R.T. and T = 80 K show one major doublet which corresponds to the HS1 is due to high spin iron(II) sites coordinated by four N atoms of cyano groups and two N atoms of 4-Clpy ligand in the sample 1. Two minor doublets coexisted in sample 1. One minor doublet with a large quadrupole splitting can be explained by the presence of defects in the coordination polymer frameworks. Another minor doublet is with a small quadrupole splitting, indicating the presence of iron(III) high spin species or iron(II) low spin species.

This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

⁵⁷Fe Mössbauer spectroscopy; coordination polymer; high spin state

Hrčak ID:

157569

URI

https://hrcak.srce.hr/157569

Publication date:

20.6.2016.

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