Potato starch derivatives with some chemically bound bioelements.
Metal alkoxides [Cr(III), Mg(II), Mo(V), V(III), and W(V)] taken in 1:1 equimolar proportions, calculated per one D-glucose unit, reacted with a pregelatinized starch in microwave assisted processes into the corresponding starch cationic metal derivatives. In each case, the crosslinking occurred as a consequence of the substitution of two alkoxide groups in the metal alkoxide reagents with two D-glucose units. Involvement of the 6-CH2OH moiety of the D-glucose units in formation of the valence bond with the metal cation was the most likely, but the metal cation was additionally coordinated to the other hydroxyl groups of the D-glucose units. Chromium(III) and vanadium(II) complexes hydrolysed in full by their contact with water, whereas the other metal complexes hydrolysed only in part.
Department of Chemistry, University of Agriculture, Cracow, Poland. rrtomasi@cyf-kr.edu.pl
P
P
Tomasik
J W
JW
Anderegg
M
M
Baczkowicz
J L
JL
Jane
D000687:Amylopectin / Q000737:chemistry*; D004577:Electron Probe Microanalysis; D006868:Hydrolysis; D019216:Metals, Heavy / Q000737:chemistry*; D011198:Solanum tuberosum / Q000737:chemistry*; D013213:Starch / Q000737:chemistry*; D013818:Thermogravimetry
D019216:Metals, Heavy; D013213:Starch; D000687:Amylopectin