Fourier transform IR and Raman spectroscopy and structure of carbohydrates

Applications of Vibrational Spectroscopy to the Analysis of Polysaccharide and Hydrocolloid Ingredients

“…59 In the mid-1990s, FTmid-IR, FT-Raman, and NIR spectrometric techniques were developed to examine carbohydrate structures. 23,49 For example, structural studies of carrageenans by IR and Raman spectroscopy were conducted in order to design food products with desirable functionality. 60 -64 In the late 1990s and early 2000s, FT-Raman spectroscopy was used to monitor starch gelatinization and enzyme-catalyzed starch hydrolysis, 65 providing a control of these processes.…”

“…17 -22 In general, polysaccharides are distinguished both chemically and structurally in terms of chemical composition, configuration (fixed spatial arrangement of oxygen and hydrogen atoms around each carbon atom) and conformation (rotational isomers of groups such as hydroxyl groups and pyranose rings). 23 To better understand the properties and functions of polysaccharides, their structural organization and molecular arrangement should be determined. Numerous methods have been established for structural determination of polysaccharides, such as enzymatic methods, gas-liquid chromatography mass spectroscopy, chiro-optical methods (e.g., circular dichroism spectroscopy), nuclear magnetic resonance (NMR) spectrometry, and laser light, X-ray, and neutron scattering.…”

Tailoring of locust bean gum and development of hydrogel beads for controlled oral delivery of glipizide

“…In CMLBG, -CH2 stretching vibration was also increased (1325.13 cm −1 ) compared to LBG (1306.87 cm −1 ). In addition, while the C-O stretching of ether and C = O stretching of acid were observed in derivatized gum, respectively, at 1607.43 cm −1 and 1451.77 cm −1 (Vogt et al, 1995;Zhbankov et al, 1997;Thygesen et al, 2003), the same were absent in LBG. Thus, it can be interpreted that O-carboxymethyl groups have been introduced into LBG.…”

Analysis of Bioactive Olygosaccharide-Metal Complexes by Modern FTIR Spectroscopy: Copper Complexes

“…In the spectra of RLMP and the complexes, bands of negligible intensity are found in the region (950, 916, 860, 760 cm -1 ). According to the normal coordinate treatment on the RLMP model, these bands are interpreted as due to mixed CCH deformation vibrations coupled with CCO, OCO, and COC bending (Buslov et al, 1998;Zhbankov et al, 1997;Zhbankov, 1992;Zhbankov and Avsenev, 1984;Kiselev et al, 1977). Both the number and frequencies of the bands in the IR range depend on the conformation of the D-glucopyranose units.…”

“…Fourier transform infrared spectroscopic data of synthesized complexes are rare in literature. FTIR spectroscopic characterization is now widely used to study the composition of the complex carbohydrate systems, the molecular interactions, a molecular orientation and conformational transitions of polysaccharides (Zhbankov, 1972;Panov et al, 1976;Panov & Zhbankov, 1988;Shingel, 2002;Zhbankov et al 1997). The major goal of this section is to use different FTIR spectroscopic techniques (FTIR, LNT-FTIR, ATR-FTIR, and FTIR microspectroscopy) as the main tools to verify the conformation and the structure of this type of ligand around the Cu(II) ions.…”