Hydration of monosaccharides studied by Raman scattering
Hydration of monosaccharides studied by Raman scattering
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DOI：
10.1002/jrs.5351
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发表时间：
2018-06-01
影响因子：
2.5
通讯作者：
Ricci, Maria Antonietta
中科院分区：
文献类型：
--
作者：
Ruggiero, Ludovica;Sodo, Armida;Ricci, Maria Antonietta
我们报告了葡萄糖、果糖和甘露糖的拉曼光谱研究。为了研究与水的相互作用对溶质振动模式的影响，已经记录了干粉和H2O和D2 O溶液的光谱，并在光谱的所谓“指纹区”（200- 1，400 cm（-1））进行了评论。我们已经证明了一些谱带的分裂，由于不同的端基异构体在溶液中的存在。溶剂的同位素取代允许在某些情况下确认条带归属，并且在其他情况下提出新的归属。重要的是，溶剂的同位素取代证明了所研究的单糖与水的相互作用存在差异，这被合理化为由于氢键引起的振荡器惯性和键强度之间的平衡。特别是，葡萄糖和果糖与水强烈相互作用，而在甘露糖的情况下，我们观察到与水的相互作用较弱，其端基异构体的行为不同。
We report a Raman spectroscopy study of glucose, fructose, and mannose. The spectra have been recorded for the dry powders and for solutions in H2O and D2O and commented in the so-called "fingerprint region" of the spectra (200-1,400 cm(-1)), in order to study the influence of the interaction with water on the solute vibrational modes. We have evidenced splitting of some bands, due to the presence of different anomers in solution. The isotopic substitution of the solvent has allowed in some instances to confirm the band assignment and, in other cases, to propose new assignments. Importantly, the isotopic substitution of the solvent has evidenced differences in the interaction of the investigated monosaccharides with water, which are rationalized as due to a balance between the inertia of the oscillator due to H-bonding and bond strength. In particular, glucose and fructose interact strongly with water, whereas in the case of mannose, we have observed a weaker interaction with water and a different behaviour of its anomers.