El Instituto Politécnico Nacional
Contribuye al desarrollo económico y social de la nación, a través de la formación integral de personas competentes; de la investigación, el desarrollo tecnológico y la innovación. Además tiene reconocimiento internacional por su calidad e impacto social.
Por favor, use este identificador para citar o enlazar este ítem:
http://repositoriodigital.ipn.mx/handle/123456789/11133| Título : | Unique coordination of pyrazine in T[Ni(CN)4] 2pyz with T ¼ Mn, Zn, Cd |
| Palabras clave : | Crystal chemistry Structural studies Layered compounds Pillared solids |
| Fecha de publicación : | 16-ene-2013 |
| Editorial : | Journal of Solid State Chemistry |
| Descripción : | The materials under study, T[Ni(CN)4] 2pyz with T ¼ Mn, Zn, Cd, were prepared by separation of T[Ni(CN)4] layers in citrate aqueous solution to allow the intercalation of the pyrazine molecules. The obtained solids were characterized from chemical analyses, X-ray diffraction, infrared, Raman, thermogravimetry, UV–Vis, magnetic and adsorption data. Their crystal structure was solved from ab initio using direct methods and then refined by the Rietveld method. A unique coordination for pyrazine to metal centers at neighboring layers was observed. The pyrazine molecule is found forming a bridge between Ni and T atoms, quite different from the proposed structures for T ¼ Fe, Ni where it remains coordinated to two T atoms to form a vertical pillar between neighboring layers. The coordination of pyrazine to both Ni and T atoms minimizes the material free volume and leads to form a hydrophobic framework. On heating the solids remain stable up to 140 1C. No CO2 and H2 adsorption was observed in the small free spaces of their frameworks. & 2009 Elsevier Inc. All rights reserved. |
| URI : | http://www.repositoriodigital.ipn.mx/handle/123456789/11133 |
| Otros identificadores : | Journal of Solid State Chemistry 182 (2009) 757–766 http://hdl.handle.net/123456789/644 |
| Aparece en las colecciones: | Doctorado |
Ficheros en este ítem:
| Fichero | Descripción | Tamaño | Formato | |
|---|---|---|---|---|
| 2009JSSChPyrazine 2.pdf | 82.38 kB | Adobe PDF | Visualizar/Abrir |
Los ítems de DSpace están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.