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Inclusion of riboflavin in beta-cyclodextrin: a fluorimetric and absorption spectrometric study

Dalim Kumar Roy1, Nipamanjari Deb, Bankim Chandra Ghosh

  • 1Department of Chemistry, The University of Burdwan, Golapbag, W.B. 713104, India.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|March 6, 2009
PubMed

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IR and UV–Vis Spectroscopy of Carboxylic Acids01:28

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In IR spectroscopy of carboxylic acids, the C=O bond shows a characteristic band between 1710 and 1760 cm⁻¹, and the O–H bond exhibits a broad band between 2500 and 3300 cm⁻¹.
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency, 1710 cm−1. The C=O bond of the...