Department of Physical Chemistry, Kazan Federal University, Kremlevskaya 18, Kazan 420008, Russia.
Int J Mol Sci. 2023 Apr 4;24(7):6724. doi: 10.3390/ijms24076724.
The paper reports the results of investigation intermolecular interactions between alanine and sarcosine anhydride in organic solvents. The absorption frequencies of cyclic dipeptide in solvents were measured by IR spectroscopy. The effect of Van der Waals interactions and the hydrogen bonding of solvents on absorption frequencies of the C=O group of anhydrides was discussed. The spectroscopic parameters for C=O∙∙∙H-O hydrogen bonding complexes of anhydride with methanol in aprotic and proton donor solvent are obtained. In multi-particle complexes of dipeptides with aliphatic alcohols, the hydrogen bond enhancement was between 10 and 16%, which is significantly lower than it is for amide complexes.
本文报道了在有机溶剂中丙氨酸和肌氨酸酐之间的分子间相互作用的研究结果。通过红外光谱法测量了环二肽在溶剂中的吸收频率。讨论了范德华相互作用和溶剂氢键对酐的 C=O 基团吸收频率的影响。得到了与甲醇在质子给体溶剂中非质子溶剂中酐的 C=O∙∙∙H-O 氢键复合物的光谱参数。在二肽与脂肪醇的多粒子络合物中，氢键增强为 10%至 16%，这明显低于酰胺络合物。
