High-temperature spin-crossover in coordination compounds of iron(II) with tris(pyrazol-1-yl)methane
| Autor: | L. G. Lavrenova, Svetlana E. Solovieva, O. G. Shakirova, Victor V. Syakaev, A. R. Mustafina, T.P. Griaznova, Sergey A. Katsyuba, E. A. Shusharina, V. V. Skripacheva, V. A. Daletsky |
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| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Thermochromism Chemistry Analytical chemistry Infrared spectroscopy Crystal structure Magnetic susceptibility Coordination complex Inorganic Chemistry Crystallography Spin crossover Materials Chemistry Outer sphere electron transfer Physical and Theoretical Chemistry Spectroscopy |
| Zdroj: | Inorganica Chimica Acta. 363:4059-4064 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2010.08.013 |
| Popis: | Novel mononuclear Fe(II) complexes of tris(pyrazol-1-yl)methane [Fe{HC(pz)3}2]2+ with SiF 6 2 - and p-sulfonatothiacalix[4]arene (TCAS4−) as counterions were obtained. The compounds were characterized by magnetic susceptibility method, IR and UV–Vis spectroscopy. The structure of [Fe{HC(pz)3}2]SiF6 has been analyzed by single-crystal X-ray diffraction. The 1H NMR spectroscopy measurements of [Fe{HC(pz)3}2]2(TСAS) in aqueous solution reveal the outer sphere inclusion of [Fe{HC(pz)3}2]2+ into the cyclophanic cavity of TCAS4−. The temperature induced spin-crossover 1А1 ⇔ 5Т2, accompanied by thermochromism, has been revealed from the temperature dependence of μeff and IR spectra for both complexes. The comparative analysis of magnetochemical and spectroscopy data elucidates the effect of the cyclophanic counterion on the physico-chemical properties of Fe(II) complex. |
| Databáze: | OpenAIRE |
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