What absorbs at 1577 cm⁻¹ in an FTIR spectrum?
A band near 1577 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
Posibles asignaciones de grupos funcionales
| Grupo funcional | Hechos de respaldo | Fuentes citadas | Confianza máxima |
|---|---|---|---|
| Aromatic ring | 3 | 3 | 0,9 |
| Carboxyl (COOH) | 2 | 1 | 0,9 |
| Urethane | 1 | 1 | 0,9 |
| Alkene (C=C) | 1 | 1 | 0,9 |
| Amide | 1 | 1 | 0,9 |
| C=n | 1 | 1 | 0,9 |
| Lewis acid site | 1 | 0 | 0,7 |
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 0,9
“Text: 'carboxylate cm-1 bands at 1577 and 1543' and 'COO- band'”
Gonen 等 - 2010 - Preparation and Characterization of Calcium Steara DOI: 10.1021/ie901437d -
C=n confianza 0,9
“Explicit assignment: C=N band at 1577 cm-1.”
Shamsuddin 和 Abd Karim - 2016 - Synthesis and characterization of N, N'-bis[4-[1-( DOI: 10.1063/1.4966745 -
Aromatic ring confianza 0,9
“Explicitly assigned to quinoid ring mode in text: 'quinoid to benzenoid ring modes (~1577 cm-1/~1496 cm-1)'”
Abdiryim 等 - 2012 - Solid-State Synthesis of PolyanilineSingle-Walled DOI: 10.3390/ma5071219 -
Aromatic ring confianza 0,9
“Assigned to aromatic bands of PES.”
Garcia-Ivars 等 - 2014 - Development of fouling-resistant polyethersulfone DOI: 10.1016/j.seppur.2014.07.056. -
confianza 0,9
“Text: '1577, 1604 (aromatic C-C stretching)'”
Iliadi 等 - 2022 - Epsilon ffect of cleansers on the composition and DOI: 10.1186/s40510-022-00449-w -
Amide confianza 0,9
“Amide II region”
Lewis 等 - 2010 - Evaluation of FTIR Spectroscopy as a diagnostic to DOI: 10.1186/1471-2407-10-640 -
Alkene (C=C) confianza 0,9
“Explicit assignment in text: 'ca. 1577 (C=C stretch)'”
Papliaka 等 - 2017 - FTIR imaging and HPLC reveal ancient painting and DOI: 10.1007/s12520-015-0270-3 -
Urethane confianza 0,9
“Same as above.”
de Almeida 等 - 2016 - Preparation and characterization of polyurethane w DOI: 10.1590/0104-1428.2151
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