What absorbs at 1007 cm⁻¹ in an FTIR spectrum?
A band near 1007 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
Resposta rápida
A band near 1007 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Possíveis atribuições de grupos funcionais
| Grupo funcional | Fatos de suporte | Fontes citadas | Maior confiança |
|---|---|---|---|
| Siloxane (Si-O-Si) | 3 | 3 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Phosphate (PO4) | 2 | 2 | 1,0 |
| Metal hydroxyl | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Sulfate (SO4) | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Metal oxo | 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.
Materiais possíveis
| Material | Picos de suporte | Grupos sobrepostos | Fontes citadas |
|---|---|---|---|
| glucose | 1007, 1740, 1400 | Hydroxyl (O-H) | 1 |
| TiO2 | 1007, 1700, 1093 | Hydroxyl (O-H) | 1 |
| biochar | 1007, 1640, 1115 | Hydroxyl (O-H) | 1 |
Os materiais são mostrados apenas quando o mesmo conjunto de literatura suporta esta banda e pelo menos um pico característico adicional.
Lógica do espectro
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1007 cm⁻¹ is usually not enough for material identification by itself.
Uso no mundo real
Este tipo de consulta é comum em identificação de polímeros, triagem de plásticos desconhecidos, solução de problemas de CQ, verificação de materiais reciclados e revisão de atribuição de picos apoiada pela literatura.
Erros comuns
- Tratar uma banda isolada como prova de um material sem verificar pelo menos um ou dois picos de suporte.
- Ignorando sobreposição: vários grupos funcionais podem contribuir próximo ao mesmo número de onda.
- Ignorar a validação quando aditivos, misturas, oxidação ou contaminação podem distorcer o espectro.
Conselho de verificação
Quando a ambiguidade persistir, valide a hipótese com DSC, GC-MS ou TGA, especialmente para misturas, amostras degradadas e polímeros carregados.
Literatura por trás destas atribuições
-
Metal oxo confiança 1,0
“LLM confirmed rule peak-group candidate”
Optical and structural characterization of quadruplet and quintuplet molybdenum-containing phosphate glasses DOI: 10.1142/S0217984916502705 -
Water (H2O) confiança 1,0
“l cm-1 (cid:1)C, "degenerate" between 200 and 300 phosphoric acid undergoes condensa- [P(OH) very strong bands at 1007 and 1165 3 43tion reactions with loss of water molecules, leading to the stretching mode of PO ], a weak band at and PO s”
Yi 等 - 2011 - Phosphine Adsorption Removal from Yellow Phosphoru DOI: 10.1021/ie101622x -
C-O single bond confiança 1,0
“Peak was observed at 1006.7 of smooth and non-homogeneous surface, while the 6b the the C-OH stretch vibration within the cellulosic structure.”
Nanobiocatalyst beds with Fenton process for removal of methylene blue DOI: 10.1007/s13201-021-01367-8 -
Sulfate (SO4) confiança 1,0
“The characteristic peaks at 1131 and cm-1 1007 correspond to the stretching vibration of sulfate (-S = O).”
Development of New Amphiphilic Catalytic Steam Additives for Hydrothermal Enhanced Oil Recovery Techniques DOI: 10.3390/catal12080921 -
Aromatic ring confiança 1,0
“However, the representative peaks for aromatic carbon ap1007/s11356-013-1659-0.”
Simultaneous immobilization of heavy metals in soil environment by pulp and paper derived nanoporous biochars DOI: 10.1007/s40201-018-0294-6 -
Siloxane (Si-O-Si) confiança 1,0
“Part of doublet assigned to Si-O-Si.”
Bao 等 - 2018 - Manufacturing and characterization of long-acting DOI: 10.1016/j.ijpharm.2018.09.004. -
Silicon (Si) confiança 1,0
“the one located at 1089 cm-1 in MK to 1007 cm-1 due to the asymmetric stretching of the Si-O-T band”
Metakaolin-Based Geopolymer with Added TiO2 Particles: Physicomechanical Characteristics DOI: 10.3390/coatings7120233 -
Carbohydrate confiança 1,0
“2, however, the contribution of glucose cannot be neglected, especially due to the bands at 1007, 1045, 1072 and cm-1.”
Leopold 等 - 2011 - Quantification of carbohydrates in fruit juices us DOI: 10.3233/SPE-2011-0529
Tem um espectro com esta banda?
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