What absorbs at 1749 cm⁻¹ in an FTIR spectrum?
A band near 1749 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
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| Carbonyl (C=O) | 4 | 4 | 0,95 |
| Carboxyl (COOH) | 2 | 2 | 0,9 |
| Ester | 1 | 1 | 0,9 |
| Lipid | 1 | 1 | 0,9 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Litteratur bakom dessa identifieringar
-
förtroende 1,0
“Vibration assigned to C=O”
Thabede 等 - 2021 - Magnetite Functionalized Nigella Sativa Seeds for DOI: 10.1155/2021/6655227 -
Carbonyl (C=O) förtroende 0,95
“Explicit assignment in text.”
Arul 等 - 2023 - Detoxification of Toxic Organic Dye by Heteroatom- DOI: 10.3390/agronomy13010205 -
Carbonyl (C=O) förtroende 0,9
“Assigned to carbonyl mode of P700+”
Breton 等 - 1999 - FTIR study of the primary electron donor of photos DOI: 10.1021/bi991216k -
Carboxyl (COOH) förtroende 0,9
“Peak/trough at 1749/1740 cm-1 assigned to carboxyl group affected by CO binding.”
Marechal 等 - 2012 - Assignment of the CO-sensitive carboxyl group in m DOI: 10.1016/j.bbabio.2012.03.036 -
Carbonyl (C=O) förtroende 0,9
“C=O absorption peak at 1749 cm-1”
Han 等 - 2018 - Biodegradable and Toughened Composite of Poly(Prop DOI: 10.3390/ijms19072032 -
Lipid förtroende 0,9
“Explicit assignment: 'lipid band at 1749 cm-1'”
Lojewski 等 - 2011 - Reflective and photoacoustic infrared spectroscopi DOI: 10.1007/s00339-011-6512-z -
Ester förtroende 0,9
“C=O (ester) stretching”
Prabsangob 和 Benjakul - 2018 - Enhancement of thermal stability of soybean oil by DOI: 10.9755/ejfa.2018.v30.i11.1862 -
förtroende 0,9
“Stretching vibration peak for PLA.”
Wang 等 - 2018 - Influence of the Lignin Content on the Properties DOI: 10.3390/polym10091013
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