An in situ high-temperature single-crystal investigation of a dehydrated metal-organic framework compound and field-induced magnetization of one-dimensional metaloxygen chains

(Figure Presented) The arrangement of the spins of adjacent helical cobalt-oxygen chains that form the backbone of the framework (see figure) of a microporous coordination polymer lead to metamagnetic behavior. When the polymer is heated, the metal center loses a coordinated water molecule and alters its coordination geometry from octahedral to square-pyramidal, although the framework remains stable. © 2005 Wiley-VCH Verlag GmbH & Co. KGaA.