Croatica Chemica Acta, Vol. 89 No. 1, 2016.
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
<sup>57</sup>Fe Mössbauer spectroscopy; coordination polymer; high spin state
Hrčak ID:
157569
URI
Publication date:
20.6.2016.
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