Sulfur heterocycle — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Sulfur heterocycle 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
Sulfur heterocycle 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 Sulfur heterocycle
| Número de onda (cm⁻¹) | Fatos de suporte | Fontes citadas | Maior confiança |
|---|---|---|---|
| 3079 | 1 | 1 | 1,0 |
| 1516 | 1 | 1 | 1,0 |
| 1513 | 1 | 1 | 1,0 |
| 3045 | 1 | 1 | 1,0 |
| 3105 | 1 | 1 | 1,0 |
| 690 | 1 | 1 | 1,0 |
| 750 | 1 | 1 | 1,0 |
| 1614 | 1 | 1 | 1,0 |
| 1430 | 1 | 1 | 1,0 |
| 1440 | 1 | 1 | 1,0 |
| 1645 | 1 | 1 | 1,0 |
| 916 | 1 | 1 | 1,0 |
| 1650 | 1 | 1 | 1,0 |
| 3100 | 1 | 1 | 1,0 |
| 1451 | 1 | 1 | 1,0 |
| 1048 | 1 | 1 | 1,0 |
| 1654 | 1 | 1 | 1,0 |
| 1569 | 1 | 1 | 1,0 |
| 1398 | 1 | 1 | 1,0 |
| 1576 | 1 | 1 | 1,0 |
| 1320 | 1 | 1 | 0,8 |
| 1490 | 1 | 1 | 0,8 |
| 817 | 1 | 0 | 1,0 |
| 1477 | 1 | 0 | 1,0 |
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.
Literatura por trás destas atribuições
-
1576 cm⁻¹ confiança 1,0
“Synthesis of PMOT/NiO nanocomposite The band thiophene ring were found at 1576 and 1398 cm-1 at 1092 has been identified as the stretching vibration of”
Sehgal 和 Narula - 2015 - Structural, morphological, optical, and electrical DOI: 10.1007/s00396-015-3663-z -
1654 cm⁻¹ confiança 1,0
“However, and based on the compounds identified by NMR, the ATR-FTIR bands that can only be assigned to the red pigment and thus confirm its cm-1 presence in the sample are band at 1654 related to carbonyl in thiophene ring (C=O), cm-1;”
Aguilar-Rodriguez 等 - 2023 - Microanalytical Characterization of an Innovative DOI: 10.3390/molecules28020564 -
1451 cm⁻¹ confiança 1,0
“Both spectra displayed A thiophene ring vibration was found at 1451 and =”
Ashraf 等 - 2014 - Preparation and properties of multilayered polymer DOI: 10.1515/polyeng-2013-0297 -
3100 cm⁻¹ confiança 1,0
“Around 3100 the C-H stretch on the 2 and 5 position of the thiophene ring can be seen.”
Dams 等 - 2006 - Plasma deposition of thiophene derivatives under a DOI: 10.1002/cvde.200606483 -
1650 cm⁻¹ confiança 1,0
“LLM confirmed rule peak-group candidate”
Jamal 等 - 2014 - Solid-State Synthesis and Photocatalytic Activity DOI: 10.3390/ma7053786 -
1645 cm⁻¹ confiança 1,0
“P3HT shows a peaks at 2925 and 2844 assigned to C-H cm-1 stretching vibrations, the peak at 1645 is assigned to the aryl substituted C=C of the thiophene cm-1 is attributed to the vibrational stretch of the thiophene ring and peaks ring, th”
Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties DOI: 10.3390/ma8052415 -
1430 cm⁻¹ confiança 1,0
“This spectrum also shows bands at 1614 and 1514 cm-1 that refer cm-1 possible to observe a band at 1638 corresponding to the acetylated amino group of C=C to the stretching of the double bond of the thiophene ring as well as a band at 1430”
Chitosan-Based Films with 2-Aminothiophene Derivative: Formulation, Characterization and Potential Antifungal Activity DOI: 10.3390/md20020103 -
750 cm⁻¹ confiança 1,0
“Belong to thiophene ring vibrations.”
Refat 等 - 2021 - SYNTHESIS, CHARACTERIZATION, THERMAL ANALYSIS AND DOI: 10.4314/bcse.v35i1.11
See Sulfur heterocycle in your own spectrum
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