Cellulose derivatives modified by sodium tellurate and a chromium(III) tellurate complex.

Author(s) Butler, I.S.; El-Sherbeny, H.Allah M.; Kenawy, I.; Mostafa, S.I.
Journal Int J Biol Macromol
Date Published 2016 Jul

A novel cellulose (Cell) derivative, sodium-tellurato (Cell-TeO(OH)4(ONa)/Cell-Cl), has been synthesized from the reaction of 6-chloro-6-deoxycellulose (Cell-Cl) with telluric acid in the presence of sodium hydroxide. The subsequent reaction of this polymeric material with chromium(III) in aqueous solution yields the [Cr(Cell-TeO3(OH)3/Cell-Cl)(Cell-TeO2(OH)4/Cell-Cl)(H2O)3] complex. The molecular structures and morphology of the new polymer and the Cr(III) complex have been examined using elemental analysis, solid-state (13)C NMR, UV-vis, XRD and FTIR spectroscopy, and SEM-EDX, TGA and magnetic measurements. The results are considered to be consistent with the formulations proposed. The deprotonation constants of the modified cellulose and the stability constant of the Cr(III) complex have been determined by pH-metric measurements.

DOI 10.1016/j.ijbiomac.2016.03.062
Keywords Cellulose; Chromium; Hydrogen-Ion Concentration; Magnetic Resonance Spectroscopy; Polymers; Protons; Tellurium
ISSN 1879-0003
Citation Int J Biol Macromol. 2016;88:392402.

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