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Qualitative Identification of Carboxylic Acids, Boronic Acids, and Amines Using Cruciform Fluorophores
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Published on: August 19, 2013

Colorimetric sensing of polyhydroxy compounds by an inclusion complex of boronic acid-modified amylose

Masayuki Tsuchiya1, Yasumasa Kanekiyo

  • 1Department of Biotechnology and Environmental Chemistry, Kitami Institute of Technology, Koen-cho, Kitami, Hokkaido, Japan.

The Analyst
|April 28, 2011
PubMed

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IR and UV–Vis Spectroscopy of Carboxylic Acids01:28

IR and UV–Vis Spectroscopy of Carboxylic Acids

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...