What absorbs at 1276 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 1276 cm⁻¹ puede apuntar a varios grupos funcionales. A continuación se muestran las asignaciones más probables, clasificadas por cuánta evidencia publicada respalda cada una — cada una trazable a literatura (DOI) y validada de forma cruzada con nuestros más de 130,000 espectros de referencia y grafo de conocimiento.
Backed by 8 cited sources
Posibles asignaciones de grupos funcionales
| Grupo funcional | Hechos de respaldo | Fuentes citadas | Confianza máxima |
|---|---|---|---|
| Methoxy (OCH3) | 4 | 4 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| C-O single bond | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Protein alpha helix | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| N n bond | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
La clasificación refleja la evidencia acumulada de la literatura, no una única regla autorizada. Siempre confirme según el contexto de su muestra.
Literatura detrás de estas asignaciones
-
Carboxyl (COOH) confianza 1,0
“are those at 1460 and 2 3 1276cm-1 COOH stretch/bend combination is observed at and 1189cm-1.”
Font 等 - 2007 - Fourier transform infrared spectroscopy as a suita DOI: 10.1016/j.aca.2007.07.021 -
Amide confianza 1,0
“C-H modes.24,36 be seen in the meta-Ra first metastable intermediate in the Pr indole stretch and bending A tryptophan f C-N Cph1.1 Pfr pathway of indole vibration that contains stretching is reported at 1276 The mutation of a highly conser”
van Thor 等 - 2005 - Assignments of the Pfr-Pr FTIR difference spectrum DOI: 10.1021/jp052323t -
Acetate confianza 1,0
“= cm-1 the C O stretch at 1680.83 is the result of the conjugaCC = O tion effect where C O stretch absorbs at a lower frequency stretch 1275.89, 1194.05 = cm-1 than normal.”
Chong 等 - 2016 - An improved method for aldol condensation catalyse DOI: 10.1515/gps-2015-0126 -
Aromatic ring confianza 1,0
“the peak at cm-1 cm-1 1276 is due to phenyl CH rocking vibrations;”
Durazzo 等 - 2018 - Qualitative Analysis of Traditional Italian Dishes DOI: 10.3390/su10114112 -
Acetate confianza 1,0
“The peak near 1276 is associated with cm-1 C-O stretching vibration.”
Enhanced Saccharification of Purple Alfalfa via Sequential Pretreatment with Acidified Ethylene Glycol and Urea/NaOH DOI: 10.3390/pr10010061 -
Hydroxyl (O-H) confianza 1,0
“carbonyl groups are denoted by the absorption band at 1737 The absorption bands at cm-1 1276 and 1153 represent the O-H bending and C-O stretching of aliphatic carboxyl and hydroxyl groups overlapping with the C-O stretching of -COOR (Liu e”
Liu 等 - 2019 - Characterization and Identification of Lacquer Fil DOI: 10.1007/BF02467555 -
confianza 1,0
“Explicit assignment in text.”
Natarajan 等 - 2020 - Comparison of MA-g-PP effectiveness through mechan DOI: 10.1590/0104-1428.05620 -
Carbonyl (C=O) confianza 1,0
“Zhao, contributionstotheprediction.Thepeakat1666cm-1 maybe "Discrimination of Rhizoma Gastrodiae (Tianma) using 3D 1276cm-1 due to carbonyl group [17].”
Qi 等 - 2017 - Quantitative and Qualitative Characterization of G DOI: 10.1155/2017/3194146
¿Tiene un espectro con esta banda?
Cargue su espectro FTIR y obtenga un informe de interpretación completo — asignaciones de picos con citas bibliográficas, coincidencias de librerías y una cadena de evidencia con calificación de confianza — en segundos.
Interpretar mi espectro