Properties of 2,3‐dicarboxy cellulose combined with various metallic ions

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Abstract
2,3‐Dicarboxy cellulose and partially oxidized 2,3‐dicarboxy cellulose were prepared in good yields from the corresponding dialdehyde cellulose obtained by periodate oxidation of cellulose according to a modification of the method described by Hofreiter, Wolff, and Mehltretter [J. Am. Chem. Soc., 79, 6457 (1957)]. The 2,3‐dicarboxy cellulose oxidized to nearly 100% oxidation level was completely soluble in water, but the 2,3‐dicarboxy cellulose of 70% oxidation level was not. The former 2,3‐dicarboxy cellulose took up various metallic ions other than alkali metals to form a precipitate or solid. The metal contents taken up corresponded to the theoretical values calculated as combined in the form of metallic salt of the carboxylic acid group. 2,3‐Dicarboxy cellulose combined with metallic ions such as copper, cobalt, and nickel ions gave viscous, gel‐like products, which solidified when exposed to air. The properties of products combined with such metallic ions are discussed.

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