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A problem of iron nanoclusters protection from aggressive medium by means of perfluorinated radicals has been considered. A procedure for obtaining the protected particles has been developed. Narrow particle size distribution has been observed. Phase analysis demonstrating the presence of magnetic Fe phase and Fe organic sulfide phase has been performed.Polymer-metallic nanocomposites are now intensively studied (1). Above all, the interest in such composites relates to a possibility of achieving unusual properties of metals inherent in their fine-dispersed state. The methodologies of synthesis of metal nanoclusters in vivo used currently are not sufficiently mechanized and not always suitable for scale production.Thus, it is often necessary to obtain nanoclusters of metals (such as Fe, Sn, etc.) which contains atoms with a ''zero'' oxidation degree and to assume special methods preventing oxidation processes. Significant difficulties arise when it is necessary to obtain the predetermined number average diameter of a nanocluster, which is accounted for by the processes of spontaneous aggregation inherent in this dimensional class of substances. One of the most promising methods of overcoming these difficulties is separate synthesis and stabilization of metal nanoclusters.Address correspondence to V. M. Rodin, S.V. Lebedev Rubber Research

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