Heterometallic Reduced Layered Vanadates

The charge densities and compositions of many known solids with VxOy layers were screened for possible charge density matches with M(pyz)x (M = Fe, Co, Ni, Cu, Zn) layers [35, 52], as an aid in the synthesis of new heterometallic multilayered vanadates. Close matches were found with M(pyz)x (M = Fe, Co, Ni) coordination polymers, ranging from 0.022/A -0.053/A, and which might suitably form in the presence of the flexible types of V2O5 layers. For example, Co(pyz) layers of chains in Co(pyz)(V03)2 [53] have a charge density of 

The late transition metals, either Co or Ni, bond to four apical oxygen atoms of two vertex-shared 5 units (Fig. 17.9a), two each to layers both above and below, and also bond to two bridging pyrazine ligands in a trans fashion. The al- 

would like to thank aU of his previous and current group members who have contributed to the results of this research and is grateful for funding from the American Chemical Society Petroleum Research Fund and the Beckman Foundation. 

Naumov, A.V. Vlrovets, S.V. Korenev, A.l. Gubanov, Acta Crystallogr. C 

Roubeau, L. Bouhedja, J. Li-vage, G. Ferey, Chem. Mater. 2000, 32, 67. 

---