Anhydride — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Anhydride 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
Quick answer
Anhydride is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.
Characteristic FTIR peaks for Anhydride
| Nombor gelombang (cm⁻¹) | Fakta sokongan | Sumber dipetik | Keyakinan tertinggi |
|---|---|---|---|
| 1780 | 3 | 3 | 1.0 |
| 1784 | 2 | 2 | 1.0 |
| 1770 | 2 | 2 | 1.0 |
| 1850 | 2 | 2 | 1.0 |
| 699 | 1 | 1 | 1.0 |
| 1590 | 1 | 1 | 1.0 |
| 1852 | 1 | 1 | 1.0 |
| 1074 | 1 | 1 | 1.0 |
| 1765 | 1 | 1 | 1.0 |
| 1159 | 1 | 1 | 1.0 |
| 1777 | 1 | 1 | 1.0 |
| 1637 | 1 | 1 | 1.0 |
| 1546 | 1 | 1 | 1.0 |
| 1653 | 1 | 1 | 1.0 |
| 550 | 1 | 1 | 1.0 |
| 1810 | 1 | 1 | 1.0 |
| 1434 | 1 | 1 | 1.0 |
| 1701 | 1 | 1 | 1.0 |
| 1754 | 1 | 1 | 1.0 |
| 1033 | 1 | 1 | 1.0 |
| 730 | 1 | 1 | 1.0 |
| 1761 | 1 | 1 | 1.0 |
| 1791 | 1 | 1 | 1.0 |
| 1280 | 1 | 1 | 1.0 |
| 2363 | 1 | 1 | 1.0 |
| 618 | 1 | 1 | 1.0 |
| 1501 | 1 | 1 | 1.0 |
| 1858 | 1 | 1 | 1.0 |
| 1786 | 1 | 1 | 1.0 |
| 3266 | 1 | 1 | 1.0 |
Showing the 30 best-supported peaks of 45 total for Anhydride.
Spectrum logic
A functional-group assignment becomes more reliable when several expected bands appear together. Use this page to find the strongest-supported peaks, then confirm that the same sample exhibits a coherent pattern rather than a single isolated hit.
Real-world usage
These pages are useful for unknown material analysis, peak explanation in reports, polymer troubleshooting, and verifying whether a candidate material family is chemically plausible.
Common mistakes
- Using one functional-group page as a complete material verdict without checking the rest of the spectrum.
- Assuming the strongest band is always the most diagnostic one.
- Forgetting that processing, additives, aging, and mixtures can shift or broaden expected peaks.
Verification advice
Use DSC, GC-MS, or TGA when several material families share similar bands or when mixture effects make the FTIR assignment uncertain.
Literatur di sebalik penetapan ini
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1710 cm⁻¹ keyakinan 1.0
“and at 1009 However, that of NR/PS-g-MA (with polystyrene, 6/4) peaks of maleic anhydride at 1710 showed only low intensity of the absorption peak.”
Efficiency of maleic anhydride-modified polystyrene/natural rubber blends as sand aggregate binder DOI: 10.1063/5.0015717 -
1002 cm⁻¹ keyakinan 1.0
“cm-1, At 1002 the peak shows CO-O-CO stretching, which indicates the presence of an anhydride group.”
Fatima 等 - 2021 - Extraction and Chemical Characterization of Humic DOI: 10.3390/su13168969 -
1220 cm⁻¹ keyakinan 1.0
“The genband at 1220 which is attributed to a five membered eral procedure for esterification of poly(styrene maleic cyclic anhydride (Bellamy, 1975).”
Galgali 等 - 2007 - Sugar-linked biodegradable polymers Regio-specifi DOI: 10.1016/j.carbpol.2006.06.035 -
1859 cm⁻¹ keyakinan 1.0
“LLM confirmed rule peak-group candidate”
Ha 等 - 2001 - Spectroscopic stuides on the liquid crystal alignm DOI: 10.1080/10587250108028259 -
1780 cm⁻¹ keyakinan 1.0
“Two small peaks at 1780 and 1856cm-' are cyclic anhydride peaks caused by the BTDA, which is present in a slight stoichiometric excess 17 LIQUID CRYSTAL ALIGNMENT A b S 0 r b a n 2014 C e October 1200 1400 1800 1600 1000 28 W ers avenumb 05”
Ha 等 - 1998 - Polarized Infrared Spectroscopic Studies of Polari DOI: 10.1080/10587259808025380 -
618 cm⁻¹ keyakinan 1.0
“The peaks at cm-1 cm-1 618 and 638 due to the stretching vibration of Co-O-Co (or Mn-O-Mn)”
Control of magnetic properties and band gap by Co/Mn ordering and oxygen distributions of La2CoMnO6 DOI: 10.1016/j.jmmm.2017.03.040 -
2363 cm⁻¹ keyakinan 1.0
“The bands that appear in the range 1148-1464 occur as a result of Metal-Oxygen-Metal (M-O-M) such 14 cm-1 as Fe-O-Fe and Co-O-Co [28].The presence of CO is evident by the observation of the band at 2363 15 2”
Mohammed 等 - 2018 - Effect of heat-treatment on the magnetic and optic DOI: 10.1088/2053-1591/aad1e5 -
1280 cm⁻¹ keyakinan 1.0
“of the first peak decreases greatly from 179.0 to 880cm(cid:3)1) peaks (1280, 1080, and are attributed to phosphoric Theresiduesafter theconecalorimeter testwereexaminedfor species.[21] (--O)-O-P) anhydride (P changes in char appearance by”
Synergistic effects of ferric pyrophosphate (FePP) in intumescent flameretardant polypropylene DOI: 10.1002/pat.1590
See Anhydride in your own spectrum
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