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Preparation of QCS and inks. (a) Titration of chloride ions in QCS by AgNO3. (b) FTIR spectra of CS, QCS, GADQ0%, and GADQ1.5%. (c and d) 1H NMR spectra of CS and QCS. (e and f) CS and QCS structural formulae corresponding to 1H NMR spectra peaks.
