What absorbs at 1540 cm⁻¹ in an FTIR spectrum?
A band near 1540 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 | 26 | 22 | 1.0 |
| Carboxyl (COOH) | 4 | 4 | 1.0 |
| N h | 4 | 4 | 0.9 |
| Alkene (C=C) | 2 | 2 | 0.95 |
| Nitro (NO2) | 2 | 1 | 0.9 |
| C c single bond | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 0.9 |
| Water (H2O) | 1 | 1 | 0.9 |
| Bronsted acid site | 1 | 1 | 0.9 |
| C n single bond | 1 | 1 | 0.9 |
| Urethane | 1 | 1 | 0.7 |
| Protein beta sheet | 1 | 0 | 0.9 |
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
-
Amide 信心 1.0
“Explicit assignment: 'amide II vibrations at ... 1540'”
Boydston-White 等 - 2006 - Cell-cycle-dependent variations in FTIR micro-spec DOI: 10.1016/j.bbamem.2006.04.018. -
Hydroxyl (O-H) 信心 1.0
“Explicit assignment: 'peak at 1540 was caused by the O-H and C-C vibration'.”
Liu 等 - 2021 - Biosorption of Pb(II) by the resistant Enterobacte DOI: 10.24425/aep.2021.138461 -
Carboxyl (COOH) 信心 1.0
“Attributed to asymmetric COO vibration.”
Marques 等 - 2005 - Photoluminescence properties of BaMoO4 amorphous t DOI: 10.1016/j.jssc.2005.05.024 -
Amide 信心 1.0
“explicit assignment”
Minnes 等 - 2017 - Using Attenuated Total Reflection-Fourier Transfor DOI: 10.1038/s41598-017-04678-6 -
Amide 信心 1.0
“explicit assignment”
Pegado 等 - 2018 - First evidence of microplastic ingestion by fishes DOI: 10.1016/j.marpolbul.2018.06.035 -
Alkene (C=C) 信心 0.95
“Text states 'broad peak appeared at 1540 is due to C = C stretching vibration'.”
Aziz 等 - 2021 - Enhancement in Adhesive and Thermal Properties of DOI: 10.21203/rs.3.rs-221339/v1 -
Amide 信心 0.9
“Amide-II band at 1540 cm-1”
Keceli 等 - 2020 - Dual delivery of platelet-derived growth factor an DOI: 10.1111/jre.12756 -
Amide 信心 0.9
“Explicit assignment in snippet.”
Miroiu 等 - 2010 - Composite biocompatible hydroxyapatite-silk fibroi DOI: 10.1016/j.mseb.2009.10.004
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