DFT-Calculated IR Spectrum Amide I, II, and III Band Contributions of N‑Methylacetamide Fine Components

DFT-Calculated IR Spectrum Amide I, II, and III Band Contributions of N‑Methylacetamide Fine Components

The infrared spectrum (IR) characteristic peaks of amide I, amide II, and amide III bands are marked as amide or peptide characteristic peaks. Through the nuclear magnetic resonance study, N-methylacetamide has been determined to have six fine components, which include protonation, hydration, and hy...

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Bibliographic Details
Published in:ACS omega Vol. 5; no. 15; pp. 8572 - 8578
Main Authors: Ji, Yan, Yang, Xiaoliang, Ji, Zhi, Zhu, Linhui, Ma, Nana, Chen, Dejun, Jia, Xianbin, Tang, Junming, Cao, Yilin
Format: Journal Article
Language:English
Published: United States American Chemical Society 21-04-2020
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Summary:The infrared spectrum (IR) characteristic peaks of amide I, amide II, and amide III bands are marked as amide or peptide characteristic peaks. Through the nuclear magnetic resonance study, N-methylacetamide has been determined to have six fine components, which include protonation, hydration, and hydroxy structures. Then the independent IR spectrum of every component in N-methylacetamide is calculated by using the density functional theory quantum chemistry method, and the contribution of each component to amide I, II, and III bands is analyzed. The results of this research can help to explain the formation of the amide infrared spectrum, which has positive significance in organic chemistry, analytical chemistry, and chemical biology.
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ISSN:2470-1343
2470-1343
DOI:10.1021/acsomega.9b04421