What absorbs at 2550 cm⁻¹ in an FTIR spectrum?
A band near 2550 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
Risposta rapida
A band near 2550 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.
Possibili assegnazioni di gruppi funzionali
| Gruppo funzionale | Fatti di supporto | Fonti citate | Affidabilità massima |
|---|---|---|---|
| Thiol | 7 | 5 | 1,0 |
| Hydroxyl (O-H) | 4 | 3 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Nitrile | 1 | 1 | 1,0 |
| S s | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Silicon hydride | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Sulfur | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
La classifica riflette le prove bibliografiche accumulate, non una singola regola autorevole. Conferma sempre nel contesto del tuo campione.
Materiali possibili
| Materiale | Picchi di supporto | Gruppi sovrapposti | Fonti citate |
|---|---|---|---|
| ZnO | 2550, 1400, 3430 | Hydroxyl (O-H), Alkyl C-H | 1 |
I materiali vengono mostrati solo quando lo stesso pool di letteratura supporta questa banda e almeno un picco caratteristico aggiuntivo.
Logica dello spettro
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 2550 cm⁻¹ is usually not enough for material identification by itself.
Utilizzo nel mondo reale
Questo tipo di richiesta è comune nell＇identificazione dei polimeri, nello screening di plastiche sconosciute, nella risoluzione dei problemi di controllo qualità, nella verifica dei materiali riciclati e nella revisione dell＇assegnazione dei picchi supportata dalla letteratura.
Errori comuni
- Trattare una banda isolata come prova di un materiale senza verificare almeno uno o due picchi di supporto.
- Ignorando la sovrapposizione: più gruppi funzionali possono contribuire vicino allo stesso numero d＇onda.
- Saltare la convalida quando additivi, miscele, ossidazione o contaminazione possono distorcere lo spettro.
Consiglio di verifica
Quando permangono ambiguità, convalida l＇ipotesi con DSC, GC-MS o TGA, specialmente per miscele, campioni degradati e polimeri caricati.
Letteratura dietro queste assegnazioni
-
Hydroxyl (O-H) affidabilità 1,0
“There is no evidence of O-H stretching at 2550”
Structural and magnetic properties of Co-doped ZnO thin films grown by ultrasonic spray pyrolysis method DOI: 10.1016/j.spmi.2016.11.069 -
Hydroxyl (O-H) affidabilità 1,0
“There is no evidence of O-H stretching at nanostructured thin films with Mn-doping contents: (a) 2550cm-1 1650-1750cm-1, and O-H about suggesting that 1at% and (b) 3at%.”
Kharroubi 等 - 2012 - Mn doping effect on the structural properties of Z DOI: 10.1088/0031-8949/86/01/015805 -
affidabilità 1,0
“Then, the removal of the isolated hydroxyls on the including a wavelength of 580-2000 nm, the intensities of the cm-1 Fe peaks at 2550 and 2650 were decreased, but these were 2O under the light (200-2000 nm) irradiation was 3 remained after”
Tanaka 等 - 2005 - FT-IR study on behavior of surface hydroxyls under DOI: 10.13182/FST05-A917 -
affidabilità 1,0
“The weak bands cm-1 at 2550, 1716-1710, and 1595-1510 are associated with the stretching vibrations of cm-1 diverse amino acid residues [52,53].”
New Insights into the Medieval Hispano-Muslim Panel Painting: The Alfarje Found in a Balearic Casal (Spain) DOI: 10.3390/molecules28031235 -
Thiol affidabilità 1,0
“On the cm-1 other hand, the absence of the strong S-H stretching vibration of L-Cys at around 2550 in CAE-AgNPs”
Bioinspired 5-caffeoylquinic acid capped silver nanoparticles using Coffee arabica leaf extract for high-sensitive cysteine detection DOI: 10.1038/s41598-023-34944-9 -
Phosphate (PO4) affidabilità 1,0
“The bands for N-H appear at 1625 and 3410 The absence of the band at cm-1 2550 pointed to a binding mode mostly through P-O-Fe bonds to the iron surface.”
Maranescu 等 - 2018 - The corrosion inhibitor behavior of iron in saline DOI: 10.1515/pac-2018-0513 -
Silicon hydride affidabilità 1,0
“According thesized by method 1, in the reaction with an equimolar to elemental analysis, potassium cyclotetrasiloxanolates amount of potassium hydroxide, displayed all bands characcm-1 ([KOH]/[silane]=1) (νCH 2), contain both water and etha”
Nowacka 等 - 2015 - Alkali-Metal-Directed Hydrolytic Condensation of 3 DOI: 10.1007/s12633-014-9249-4 -
S s affidabilità 1,0
“It is worth indicating that around Furthermore, the presence of the disulfide in 3DPDS-fa and 4DPDS-fa was confirmed 2% of the S-S bonds of 4DPDS-fa cleaved, as shown by the small peak located between 2550”
Trejo-Machin 等 - 2021 - Synthesis of Novel Benzoxazines Containing Sulfur DOI: 10.3390/polym13081262
Hai uno spettro con questa banda?
Carica il tuo spettro FTIR e ottieni un report di interpretazione completo — assegnazioni di picchi con citazioni bibliografiche, corrispondenze con librerie e una catena di prove con valutazione di affidabilità — in secondi.