What absorbs at 1020 cm⁻¹ in an FTIR spectrum?
A band near 1020 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 | 9 | 8 | 1.0 |
| Phosphate (PO4) | 8 | 7 | 0.9 |
| Siloxane (Si-O-Si) | 4 | 4 | 0.9 |
| Carbohydrate | 4 | 4 | 0.9 |
| C c single bond | 2 | 1 | 0.9 |
| Hydroxyl (O-H) | 2 | 1 | 0.7 |
| Silicon-oxygen (Si-O) | 1 | 1 | 0.9 |
| Alkyl C-H | 1 | 1 | 0.8 |
| C n single bond | 1 | 1 | 0.8 |
| Carboxyl (COOH) | 1 | 1 | 0.8 |
| Carbonate | 1 | 1 | 0.7 |
| Metal oxo | 1 | 0 | 0.9 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
confidence 1.0
“Text: 'intense doublet at 1087-1020 cm-1 pertinent to asymmetric stretching (ν3)'”
Baldassarre 等 - 2023 - Structural Characterization of Low-Sr-Doped Hydrox DOI: 10.3390/cryst13010117 -
C-O single bond confidence 1.0
“Explicit assignment in text”
Gregorio 等 - 2017 - Analysis of human bodily fluids on superabsorbent DOI: 10.1016/j.talanta.2016.10.061 -
confidence 1.0
“Explicit assignment in text”
Meng 等 - 2021 - Effects of load types and critical molar ratios on DOI: 10.1515/rams-2021-0019 -
confidence 0.95
“Explicit: 'absorbance peak at ∼1020 cm-1 ... CH3OH column density as measured from the ν8'”
Herczku 等 - 2021 - The Ice Chamber for Astrophysics-Astrochemistry (I DOI: 10.1063/5.0050930 -
C-O single bond confidence 0.9
“Peaks at 1020 assigned to C-O stretching vibrations of bond in starch.”
Gao 等 - 2021 - Synthetic mechanism of octenyl succinic anhydride DOI: 10.1016/j.ijbiomac.2021.01.082 -
Phosphate (PO4) confidence 0.9
“Explicit assignment: 'PO ... 1020'”
Natasha 等 - 2008 - Fourier transform infrared study on sol-gel derive DOI: 10.4028/www.scientific.net/AMR.47-50.1185 -
C-O single bond confidence 0.9
“Explicit assignment: 'Vibration band peak at around 1020 cm-1'”
Nasir 等 - 2017 - Nanostructure and Property of Electrospun SiO2-Cel DOI: 10.1016/j.egypro.2016.12.133 -
confidence 0.9
“Text: 'absorption bands at 573, 1020, 1638 cm-1 attributed for stretching vibration of tetrahedral group'.”
Pawar 等 - 2011 - Synthesis of nanocrystalline nickel-zinc ferrite ( DOI: 10.1016/j.jallcom.2010.12.079
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