Water (H2O) — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Water (H2O) tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Characteristic FTIR peaks for Water (H2O)
| Wavenumber (cm⁻¹) | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| 1640 | 27 | 22 | 1.0 |
| 1630 | 17 | 15 | 1.0 |
| 1650 | 11 | 8 | 1.0 |
| 3400 | 10 | 8 | 1.0 |
| 1620 | 8 | 6 | 0.95 |
| 1636 | 7 | 7 | 1.0 |
| 3500 | 7 | 7 | 0.9 |
| 1635 | 7 | 6 | 0.95 |
| 1633 | 6 | 6 | 0.9 |
| 3300 | 6 | 5 | 1.0 |
| 1644 | 6 | 5 | 0.9 |
| 1639 | 5 | 5 | 0.95 |
| 1600 | 5 | 4 | 0.9 |
| 1638 | 4 | 4 | 1.0 |
| 1642 | 4 | 4 | 1.0 |
| 1645 | 4 | 4 | 0.9 |
| 1648 | 3 | 3 | 1.0 |
| 3440 | 3 | 3 | 1.0 |
| 1634 | 3 | 3 | 0.9 |
| 1632 | 3 | 3 | 0.9 |
| 3630 | 3 | 3 | 0.9 |
| 1629 | 3 | 1 | 0.9 |
| 3418 | 2 | 2 | 1.0 |
| 3230 | 2 | 2 | 1.0 |
| 3370 | 2 | 2 | 0.95 |
| 1641 | 2 | 2 | 0.9 |
| 1647 | 2 | 2 | 0.9 |
| 3350 | 2 | 2 | 0.9 |
| 3420 | 2 | 2 | 0.9 |
| 1646 | 2 | 2 | 0.9 |
Showing the 30 best-supported peaks of 138 total for Water (H2O).
Literature behind these assignments
-
1993 cm⁻¹ confidence 1.0
“Microstructure of extrudates & bonding forces thereby favoring water absorption (Lim Seib, 1993).”
Ashwar 等 - 2021 - Encapsulating probiotics in novel resistant starch DOI: 10.1016/j.lwt.2020.110839 -
3258 cm⁻¹ confidence 1.0
“hydroxyl group stretching is observed at 3258 This is due to the interaction of OH group in water by H bond which is observed as a stretching mode.”
Ashwini 等 - 2021 - Synthesis and Characterization of Zinc Oxide Nanop DOI: 10.3390/catal11121507 -
3418 cm⁻¹ confidence 1.0
“The characteristic bands around 3418 are attributed to the presence of a small amount of water in the dried gel of YFeO 3.”
Asif 等 - 2021 - Evolution of structure and improvement in dielectr DOI: 10.1016/j.ceramint.2020.11.005 -
3400 cm⁻¹ confidence 1.0
“The cm-1account bands around 3400 and 1630 for the presprominent The modes A 1g, B 1g, B and Eg are Raman active while A and 2g 2u ence of absorbed molecular water.”
Azam 等 - 2012 - Effect of Mn doping on the structural and optical DOI: 10.1016/j.jallcom.2012.01.072 -
3399 cm⁻¹ confidence 1.0
“From this spectrum, the absorption peak at 3399cm-1 was attributed to the vibration of the hydroxyl group because of the fact that the SnO retained certain adsorbed water 2 from the ambient atmosphere.”
Aziz 等 - 2012 - Structure of SnO2 nanoparticles by sol-gel method DOI: 10.1016/j.matlet.2012.01.073 -
3390 cm⁻¹ confidence 1.0
“Explicit: 'pure water shows a broad absorption band with the peak position at 3390 cm-1'.”
Ashraf 等 - 2021 - Identification and properties of ion-pairs in the DOI: 10.1016/j.molliq.2020.114891 -
1640 cm⁻¹ confidence 1.0
“peak at ~1640 cm-1 related to absorbed water”
Filipova 等 - 2018 - Synthesis of Nanofibrillated Cellulose by Combined DOI: 10.3390/nano8090640 -
1650 cm⁻¹ confidence 1.0
“Text: 'H-O-H was ascribed to bending vibration; the band at 1650'”
Liu 等 - 2012 - Modifications of structure and physicochemical pro DOI: 10.1016/j.lwt.2011.10.012
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