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Disiloxanes and Functionalized Silica Gels: One Route, Two Complementary Outcomes—Guanidinium and Pyridinium Ion-Exchangers

Fig 7

FT-IR spectra evidence for selective binding of nitrate by C1 (superimposition).

Chloride salt of C1 (navy blue), chloride salt of C1 mixed with sodium nitrate in 1:2 molar ratio (pale blue), nitrate salt of C1 (green).

Fig 7

doi: https://doi.org/10.1371/journal.pone.0145680.g007