Abstract
Abstract : The reaction of silicon Phthalocyanine (PcSi) disilanols with bis(ureido)dimethylsilane and bis(ureido)siloxanes yields blue PcSi-siloxane polymers of the general formula (PcSiOSiMePh(OSiMe2)n OSiMePhO), where Me=methyl, Ph=phenyl and n=2(IV), 3(V) and 4(VI). Reactions which lead to polymers V and VI have been studied via nuclear magnetic resonance spectroscopy. The dominant shielding effect of the Pc ring which causes clear separation of methyl groups in adjacent siloxane chains facilitated this study. Polymers IV and V have been prepared from PcSi(OSiMePhOH)2 and appropriate bis(ureido)-siloxanes. Polymer V was considerably more soluble in organic solvents than polymer IV. Polymer V melted at ca. 65-70 degrees, while polymer IV softened at ca. 100 degrees (Tg) but did not melt. Molecular weights for IV(1400) and V (1200) have been estimated from their nmr spectra. (Author)
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