Synthesis and evaluation of some novel thiomers as mucoadhesive ...

Rajesh J. Oswal et al Der Pharma Chemica, 2012, 4 (4):1385-1396
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Fig.2 Comparative IR spectra of Starch and CMS-C
Fig.3 Comparative IR spectra of Guar gum and CMG-C
The formation of CMS-C and CMG-C was confirmed by the FT-IR spectrum (Fig. 2 and 3) of the derivative.
Comparison of the FT-IR spectra of native starch with CMS-C indicated the introduction of substituent groups -C=O
absorption around 1750-1754 cm -1 . As the thiolation reaction continued there was an increment in the absorption
due to carbon–sulphur stretching (C-S) at 1365 cm -1 .Also stretching due to nitrogen-hydrogen (N-H) at 3276 cm -1.
Similarly Comparison of the FT-IR spectra of Guar gum with CMG-C indicated the introduction of substituent
groups -C=O absorption around 1700–1711 cm -1 . As the thiolation reaction continued there was an increment in the
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