What absorbs at 3333 cm⁻¹ in an FTIR spectrum?
A band near 3333 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 6 cited sources
Possíveis atribuições de grupos funcionais
| Grupo funcional | Fatos de suporte | Fontes citadas | Maior confiança |
|---|---|---|---|
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
A classificação reflete a evidência acumulada da literatura, não uma única regra autoritária. Sempre confirme com o contexto da sua amostra.
Literatura por trás destas atribuições
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Hydroxyl (O-H) confiança 1,0
“The hydrolytic degradation of PVA nanofibers in the exposure of phosphate buffer solution (PBS) was confirmed by cm21 ATR-FTIR results in which a change at the intensity of the characteristic peak located at 3333 corresponding to hydroxyl g”
Askari 等 - 2016 - Three-layered electrospun PVAPCLPVA nanofibrous DOI: 10.1002/app.43309 -
Hydroxyl (O-H) confiança 1,0
“Broad peak at 328 cm-1 2923 could represent symmetric C-H stretch of a lone C-H group of tertiary carbon 329 cm-1 components (R 3C-H), and another broader and weak peak at 3333 corresponds -OH group 330 [34, 37, 38].”
Balan 等 - 2021 - Esterification of residual palm oil using solid ac DOI: 10.1016/j.jtice.2012.07.001. -
Hydroxyl (O-H) confiança 1,0
“LLM confirmed rule peak-group candidate”
Burhan 等 - 2020 - Preparation of Cyperus diffusus Vahl cellulose-pol DOI: 10.1088/1757-899X/833/1/012063 -
Carbohydrate confiança 1,0
“The author analyzed the FTIR ter/intramolecular hydrogen bonds and confirmed the cellulose I transition (3290 cm-1 and bands of inter/intramolecular hydrogen bonds and confirmed the cellulose I transition 3333 cm-1) to cellulose II (3440 cm”
Impact of NaOH Concentration on Deweaving of Cotton Fabric in Aqueous Solutions DOI: 10.3390/su13042015 -
Alkyl C-H confiança 1,0
“The crucial peaks of celcm-1, lulose are -OH stretching and C-H stretching at 3333 and 2881 respectively.”
Fabrication and Evaluation of Water Hyacinth Cellulose-Composited Hydrogel Containing Quercetin for Topical Antibacterial Applications DOI: 10.3390/gels8120767 -
Amine primary confiança 1,0
“A significant change in the intensity of peak was observed for -OH group after ammonium nitrogen adsorption, the position of the peak was shifted from 3332.82 cm-1 to 3270.09 cm-1, and the position of -NH2 group peak was shifted from 1654cm”
Chitosan Modified Zeolite Molecular Sieve Particles as a Filter for Ammonium Nitrogen Removal from Water DOI: 10.3390/ijms21072383
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