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1H MAS NMR spectra of chitosan–fumed silica composite (chitosan/SiO2) after adsorption (black) and pure solid Acid Orange 8 dye (red) collected at 60.00 kHz MAS rate and 14.1 T. 1H chemical shifts calculated at the MP2/cc-pVTZ level of theory are shown in gray together with the Acid Orange 8 molecule model.
