High nuclearity magnetic clusters: Magnetic properties of a nine cobalt cluster encapsulated in a polyoxometalate, [Co9(OH)3(H2O)6(HPO4)2(PW9O34)3]16

Authors

  • Jose Ramón Galán-Mascarós,

    1. Departamento de Quimica Inorgánica, Universidad de Valencia Dr. Moliner 50, E-46100 Burjassot (Valencia) (Spain)
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  • Dr. Carlos J. Gómez-Garcia,

    1. Departamento de Quimica Inorgánica, Universidad de Valencia Dr. Moliner 50, E-46100 Burjassot (Valencia) (Spain)
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  • Dr. Juan José Borrás-Almenar,

    1. Departamento de Quimica Inorgánica, Universidad de Valencia Dr. Moliner 50, E-46100 Burjassot (Valencia) (Spain)
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  • Prof. Eugenio Coronado

    Corresponding author
    1. Departamento de Quimica Inorgánica, Universidad de Valencia Dr. Moliner 50, E-46100 Burjassot (Valencia) (Spain)
    • Departamento de Quimica Inorgánica, Universidad de Valencia Dr. Moliner 50, E-46100 Burjassot (Valencia) (Spain)
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  • This work is supported by the Dirección General de Ciencia y Tecnologia (PB91–0652), and by the Commission of the European Communities (Human Capital and Mobility Programme). We also thank Prof. Weakley and Prof. G. Bergerhoff for sending us a list of the atomic coordinates of the title anion.

Abstract

One goal in molecular magnetism is the synthesis of clusters containing large numbers of coupled spins. In the title heteropolyanion three reconstituted Keggin like fragments [PCo3 W9O40] are assembeled to increase the spin nuclearity. The Figure shows the idealizedstructure of the Co9 cluster, illustrating the connections through oxygen and HPOmath image groups. Magnetic measurements and EPR spectra are presented, and the nature of the cluster ground state discussed.

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