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http://repositoriodigital.ipn.mx/handle/123456789/10780| Título : | Synthesis and characterization of T[Ni(CN)4] 2pyz with T¼Fe, Ni; pyz¼pyrazine: Formation of T–pyz–Ni bridges |
| Palabras clave : | Crystal chemistry Structural study Layered compound Pillared solid Spin transition |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Journal of Solid State Chemistry |
| Descripción : | The formation of T–pyz–Ni bridges (pyz¼pyrazine) in the T[Ni(CN)4] 2pyz series is known for T¼Mn, Zn, Cd and Co but not with T¼Fe, Ni. In this contribution the existence of such bridges also for T¼Fe, Ni is discussed. The obtained pillared solids, T[Ni(CN)4] 2pyz, were characterized from XRD, TG, UV–Vis, IR, Raman, M¨ossbauer and magnetic data. Their crystal structures were refined in the orthorhombic Pmna space group from XRD powder patterns. The structural behavior of these solids on cooling down to 77 K was also studied. In the 180–200 K temperature range the occurrence of a structural transition to a monoclinic structure (P21/c space group) was observed. No temperature induced spin transition was observed for Fe[Ni(CN)4] 2pyz. The iron (II) was found to be in high spin electronic state and this configuration is preserved on cooling down to 2 K. The magnetic data indicate the occurrence of a low temperature weak anti-ferromagnetic interaction between T metal centers within the T[Ni(CN)4] layer. In the paramagnetic region for Ni[Ni(CN)4] 2pyz, a reversible temperature induced spin transition for the inner Ni atom was detected. & 2011 Elsevier Inc. All rights reserved. |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/10780 |
| Otros identificadores : | Journal of Solid State Chemistry 184 (2011) 2124–2130 http://hdl.handle.net/123456789/285 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| Synthesis and characterization of T[Ni(CN)4] ;.pdf | 202.9 kB | Adobe PDF | Visualizar/Abrir |
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