What absorbs at 1656 cm⁻¹ in an FTIR spectrum?
A band near 1656 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
可能的官能基指派
| 官能基 | 支持事實 | 引用來源 | 最高信心 |
|---|---|---|---|
| Amide | 12 | 10 | 1.0 |
| Protein alpha helix | 3 | 3 | 1.0 |
| Carbonyl (C=O) | 3 | 3 | 0.9 |
| Protein beta sheet | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 0.8 |
| Protein beta turn | 1 | 0 | 0.7 |
排名反映累積的文獻證據，而非單一權威規則。請務必根據您的樣品背景進行確認。
這些指派背後的文獻
-
Alkene (C=C) 信心 1.0
“Explicit assignment: 'C=C stretching band at 1656'”
Muroga 等 - 2021 - Novel Approaches to In-Situ ATR-FTIR Spectroscopy DOI: 10.3390/polym -
Amide 信心 1.0
“Text: 'amide I (1656 for cm-1 α-helix β-sheet)'”
Peris 等 - 2023 - Roadmap for Postnatal Brain Maturation Changes in DOI: 10.1021/acschemneuro.3c00237 -
Amide 信心 1.0
“Explicit assignment: 'amide I and amide II bands, centered at 1656 and 1740 cm-1'”
Wang 等 - 2015 - Synchrotron radiation-based Fourier-transform infr DOI: 10.1016/j.apsb.2015.03.008 -
Protein alpha helix 信心 0.95
“Explicit assignment: 'α-helix at ca. 1656 cm-1'.”
Yu 等 - 2015 - Molecular basis of processing-induced changes in p DOI: 10.1016/j.saa.2015.06.050 -
Amide 信心 0.9
“Text: 'amide I peak at 1656'”
Noguchi 等 - 2001 - Triplet formation on a monomeric chlorophyll in th DOI: 10.1021/bi0019848 -
Amide 信心 0.9
“Amide-I band”
Popescu 等 - 2010 - Structural Analysis of Some Soluble Elastins by Me DOI: 10.1002/bip.21524 -
Amide 信心 0.9
“Explicit: 'Amide I peak from 1656 cm-1 to 1659 cm-1'”
Raghav 等 - 2017 - Nonenzymatic glycosylation of human serum albumin DOI: 10.1371/journal. -
Amide 信心 0.9
“Peak at 1656 cm-1 corresponding to amide-I band”
Senthivelan 等 - 2019 - Screening and production of a potential extracellu DOI: 10.1016/j.btre.2019.e00344
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