Abstract
4-Ethynylphenoxy derivatives of the cyclo- and polyphosphazenes N3P3(OC6H4CCH)6 and [NP(OC6H4CCH) x (OC6H5)2–x ] n (x = 0.04–0.38) were prepared in three steps starting from commercially available materials. TGA studies show that the addition of the ethynyl group to the polymers results in significantly increased thermal stability and char yields. Pyrolysis mass spectrometry data indicates the absence of cyclic depolymerization products in the thermolysis. The reactions of the ethynylphenoxy cyclo- and polyphosphazenes with dicobalt octacarbonyl lead to the thermally labile dicobalt hexacarbonyl complexes N3P3(OC6H4CCH·Co2(CO)6)6 and [NP(OC6H4CCH·Co2(CO) 6 ∙ ) x (OC6H5)2–x ] n . TGA and pyrolysis mass spec show that the complexes start to loose CO at temperatures as low as 40 °C. Heating the polymeric complex at 200 °C in vacuo leads to complete elimination of CO leaving cobalt nanoparticles in a polymer matrix.
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