Abstract
Potato and maize starch was titanated with titanium (IV) ethoxide. In both cases titanium was bound via the valence bond to the oxygen atom of the glucose unit 6-CH 2OH group, with insignificant coordination to other oxygen atoms present in these units, and the titanium reagent was partly complexed with starch. The amount of titanium bound to starch in both cases was dependent on the starch variety and not on the starch/titanium (IV) ethoxide ratio in the reaction. After the reaction potato and maize starch contained 37.5 and 42.0% of titanium, respectively. Titanium (IV) potato and maize ‘starchates’ fully decomposed and lost complexed titanium (IV) ethoxide at 470 and 450°C, respectively. Titanium (IV) oxide powder formed the residue in each case.
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