Cyanogels are a class of inorganic gels made of coordination polymers, in which transition metal centers are bridged by cyanide ligands. A dehydrated gel formed by the reaction of [PdCl4]2- and [Co(CN)6]3- can be processed in a conventional microwave oven to form ferromagnetic metal alloys. The cyanogel polymer directly absorbs microwave radiation, which leads to sufficient heating of the sample to cause the rapid reduction of the metal.
Solid-State Chemistry in a Microwave Oven: Preparation of Pd/Co Alloy fromCyanogel Coordination Polymers. -A Pd/Co cyanogel is prepared by mixing Na2PdCl4 and K3Co(CN)6 in a 2:1 ratio and transformed to a Pd/Co alloy by solid state reaction in a conventional kitchen microwave oven. The process yields the alloy in a fraction of the time required by traditional thermal methods. The samples are characterized by powder XRD, IR spectroscopy, and magnetic measurements. The synthesis method might open a new route to thermodynamically metastable bi-and possibly trimetallic phases. -(VONDROVA, M.; MAJSZTRIK, P. W.; GOULD, S.; BOCARSLY*, A. B.; Chem. Mater. 17 (2005) 19, 4755-4757; Dep. Chem., Princeton Univ., Princeton, NJ 08544, USA; Eng.) -W. Pewestorf 48-217
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