What absorbs at 1134 cm⁻¹ in an FTIR spectrum?
A band near 1134 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 1134 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 |
|---|---|---|---|
| Methoxy (OCH3) | 5 | 5 | 1,0 |
| Methacrylate | 5 | 5 | 1,0 |
| C-O single bond | 5 | 5 | 1,0 |
| Acetate | 5 | 5 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| S eq o | 2 | 2 | 0,8 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Silicon hydride | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 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 |
|---|---|---|---|
| cellulose | 1134, 1735, 1650 | Acetate, Methacrylate, C-O single bond | 2 |
| hemicellulose | 1134, 1730, 897 | Methacrylate, Acetate, C-O single bond | 1 |
| kraft lignin | 1134, 1744, 1710 | Methacrylate, Acetate, Methoxy (OCH3) | 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 1134 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
-
Acetate confiança 1,0
“RPMI peak at 1134 has also appeared representing the C-O commedium was then removedfrom wells and discarded,cells were ponent of an ester bond.”
Broderick 等 - 2006 - The characterisation of a novel, covalently modifi DOI: 10.1016/j.jcis.2005.12.026 -
confiança 1,0
“-NH O-C at 1103.2 and 1088.1 Weak absorption of aryl appears at 1627 and 1593 cm-1 OTES-APTS polymer shows sharp absorption at 1134.1 and 1033.8 as an asymmetric stretching of -CH Si-O-Si and Si-O-C respectively.”
Wahyuningsih 等 - 2018 - Synthesis of Optode Thin Layer using Sol Gel Hybri DOI: 10.1088/1757-899X/333/1/012021 -
Acetate confiança 1,0
“Zanoni por contribuições cm-1 éster, grupo C-O-C de atribuídas à banda em 1134 (nC-O-C);”
Barbosa 等 - 2022 - RAPID ASSESSMENT OF TRANSFORMER INSULATING VEGETAB DOI: 10.21577/0100-4042.20170914 -
Acetate confiança 1,0
“The band observed at 1134 is 9 associated with C-O due to the secondary alcohol, which can show the presence of the functional group of lignin, cellulose,”
Cheng 等 - 2018 - A new approach to improve mechanical properties an DOI: 10.1016/j.conbuildmat.2018.05.134 -
Amide confiança 1,0
“The FTIR spectrum of the parent NSB-G Department of Genetic Engineering and Biotechnology, Shahjalal Unicm(cid:1)1, S¼O C-N represented the stretching vibrations of at 1134 at versity of Science and Technology, Sylhet-3114, Bangladesh.”
Biodegradation of reactive textile dye Novacron Super Black G by free cells of newly isolated Alcaligenes faecalis AZ26 and Bacillus spp obtained from textile effluents DOI: 10.1016/j.heliyon.2019.e02068 -
Phosphate (PO4) confiança 1,0
“cm-1 Furthermore, the characteristic peak at 1134 was ascribed to the absorption of -P=O in PCF.”
Polybenzoxazine Resins with Cellulose Phosphide: Preparation, Flame Retardancy and Mechanisms DOI: 10.3390/polym13244288 -
Acetate confiança 1,0
“The band 1134 are assigned to the immunohistochemistry images of connective tissue in Atlantic cod C-O-S asymmetric stretching vibration in GAGs [40, 46],”
The use of FTIR spectroscopy to characterize connective tissue components in skeletal muscle of Atlantic cod (Gadus morhua L.) DOI: 10.1002/jbio.201800436 -
Alkyl C-H confiança 1,0
“2013), while the band at 1134 was assigned to CH in-plane deformation (Faix 1991;”
Vidal 等 - 2021 - Sulfomethylation of Radiata Pine Kraft Lignin and DOI: 10.1016/j.biotechadv.2016.10.001
Tem um espectro com esta banda?
Carregue seu espectro FTIR e obtenha um relatório de interpretação completo — atribuições de picos com citações da literatura, correspondências de biblioteca e uma cadeia de evidências com nível de confiança — em segundos.