What absorbs at 3463 cm⁻¹ in an FTIR spectrum?

Risposta rapida

A band near 3463 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

La classifica riflette le prove bibliografiche accumulate, non una singola regola autorevole. Conferma sempre nel contesto del tuo campione.

Materiali possibili

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 3463 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

  “The broad band that appear at 3463 corresponding to O-H stretching could be attributed to the 17 presence of moisture in the sample [9].”

  Mohammed 等 - 2018 - Effect of heat-treatment on the magnetic and optic DOI: 10.1088/2053-1591/aad1e5
• Water (H2O) affidabilità 1,0

  “cm-1 Absorption peak centered at 3463 and 1636 are attributed to stretching and bending vibration of H 2O 40 caused by adsorbed water or humidity which shows that the surface of the samples contain active O-H groups 41 [39].”

  Rekaby 等 - 2020 - Influence of cobalt addition and calcination tempe DOI: 10.1088/2053-1591/ab65de
• Hydroxyl (O-H) affidabilità 1,0

  “For the spectrum of PEG, the spectral band appeared at 3463 for cm-1 cm-1 O-H stretching vibrations, 2889 for C-H stretching vibrations, and 1469 and 1342 for C-H cm-1 bending vibrations.”

  Green Synthesis and Characterization of Silver/Chitosan/Polyethylene Glycol Nanocomposites DOI: 10.3390/ijms12084872
• Hydroxyl (O-H) affidabilità 1,0

  “Alternatively, the environment around Thr118 in MB is similar cm-1, to rhodopsin because of a similar O-H vibrational frequency at 3463 which originates from Thr118 that is exhibited in the unphotolized state (Figure S7).”

  Spectral Tuning Mechanism of Primate Blue-sensitive Visual Pigment Elucidated by FTIR Spectroscopy DOI: 10.1038/s41598-017-05177-4
• affidabilità 1,0

  “The bending vibration around 3463.08 1641 corresponds to N-H.”

  Kawish 等 - 2020 - Enhancement in Oral Absorption of Ceftriaxone by H DOI: 10.3390/pharmaceutics12060492
• Hydroxyl (O-H) affidabilità 1,0

  “In the spectrum of chitosan (Figure cm-1 where is crystal size, k is constant (0.94), nm 3(b)), the broad peak at 3463 is due to the -OH/-NH 𝜆 = 0.154 𝐷 2 cm-1 represents the wavelength of X-ray radiation, β is the full width stretching vib”

  Nhu Thanh Nguyen 等 - 2020 - In Situ Synthesis and Characterization of ZnOChit DOI: 10.1155/2020/3892694
• Water (H2O) affidabilità 1,0

  “The broad peak at 3463 cm-1 was the stretching stretching modes of OH/NH of the organic matrix or the adsorbed water molecules as modes of OH/NH of the organic matrix or the adsorbed water molecules as reported [56-”

  Wilson 和 Pampadykandathil - 2023 - Novel Bone Void Filling Cement Compositions Based DOI: 10.3390/bioengineering10070752