What absorbs at 1300 cm⁻¹ in an FTIR spectrum?
A band near 1300 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
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| C-O single bond | 6 | 6 | 0.9 |
| C n single bond | 4 | 4 | 1.0 |
| Amide | 4 | 4 | 0.9 |
| Alkyl C-H | 3 | 3 | 0.9 |
| Hydroxyl (O-H) | 2 | 2 | 0.9 |
| Phosphate (PO4) | 2 | 2 | 0.9 |
| Alkene (C=C) | 2 | 2 | 0.9 |
| Carboxyl (COOH) | 2 | 1 | 0.7 |
| Carbonate | 1 | 1 | 0.9 |
| Ester | 1 | 1 | 0.9 |
| Methacrylate | 1 | 1 | 0.9 |
| Silicon carbon | 1 | 1 | 0.9 |
| Nitrogen heterocycle | 1 | 1 | 0.9 |
| Metal oxygen | 1 | 1 | 0.9 |
| Amine primary | 1 | 1 | 0.8 |
| Silicon (Si) | 1 | 1 | 0.8 |
| Carbonyl (C=O) | 1 | 1 | 0.8 |
| Silicate | 1 | 1 | 0.7 |
| C=n | 1 | 1 | 0.7 |
| Carbohydrate | 1 | 1 | 0.7 |
| Aromatic ring | 1 | 0 | 0.6 |
| Fluorine (C-F) | 1 | 0 | 0.5 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
C n single bond confidence 1.0
“Attributed to C-N stretching mode.”
Abdolahi 等 - 2012 - Synthesis of Uniform Polyaniline Nanofibers throug DOI: 10.3390/ma5081487 -
confidence 0.9
“Explicit assignment: 'asymmetric stretch around 1300'”
Khunur 等 - 2020 - Thiocyanate Doping in Gel-Growth Cobalt Oxalate Cr DOI: 10.1088/1757-899X/833/1/012017 -
Metal oxygen confidence 0.9
“Explicit assignment: 'FTIR data shows a strong peak at 1300 cm-1, assignable to the Ti-O stretching vibrations mode'.”
Singh 等 - 2016 - FT-IR and Zeta Potential Measurements on TiO Nanop DOI: 10.1063/1.4948233 -
Alkyl C-H confidence 0.9
“vibration at 1300-1400 attributed to d(C-H)”
de Sousa 等 - 2008 - Study of inclusion compound in solution involving DOI: 10.1016/j.vibspec.2007.10.002 -
Amide confidence 0.9
“Explicit assignment in text.”
Ali 等 - 2023 - Biosynthesis and characterization of cobalt nanopa DOI: 10.1042/BSR20230151 -
confidence 0.9
“Explicit assignment: 'NO stretches occurred at ... 1300.4'”
Alramadhan 等 - 2023 - Structures, Characterization and DFT Studies of Fo DOI: 10.3390/cryst13050738 -
Nitrogen heterocycle confidence 0.9
“FTIR (ATR) ν 1300 (N-ring stretch).”
Amer 等 - 2019 - Elaboration of new modified electrodes (MEs) by el DOI: 10.1016/j.eurpolymj.2018.10.016 -
Silicon carbon confidence 0.9
“Text states 'Si-CH3 characteristic peaks in the wave number is 1300 cm-1-1250 cm-1'.”
Bi 等 - 2020 - The Research on Corona Aging Silicone Rubber Mater DOI: 10.19595/j.cnki.1000-
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