What absorbs at 3500 cm⁻¹ in an FTIR spectrum?
A band near 3500 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
Mahdolliset funktionaalisten ryhmien määritykset
| Funktionaalinen ryhmä | Tukevat tosiasiat | Viitatut lähteet | Korkein luottamus |
|---|---|---|---|
| Hydroxyl (O-H) | 76 | 72 | 1,0 |
| N h | 17 | 17 | 1,0 |
| Water (H2O) | 7 | 7 | 0,9 |
| Silanol (Si-OH) | 3 | 3 | 0,9 |
| Alkyl C-H | 3 | 2 | 0,9 |
| Carboxyl (COOH) | 2 | 2 | 0,9 |
| Hydrogen bond | 2 | 2 | 0,8 |
| C-O single bond | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 0,9 |
| Amine primary | 1 | 1 | 0,9 |
| Thiol | 1 | 1 | 0,7 |
Sijoitus kuvastaa kertyneitä kirjallisuustodisteita, ei yhtä auktoritatiivista sääntöä. Varmista aina suhteessa näytteesi asiayhteyteen.
Näiden määritysten taustalla oleva kirjallisuus
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N h luottamus 1,0
“NH 2 It is stated that in amines, the N H stretching vibraCoumarins have two characteristically strong absorption 3500-3300cm-1.”
Arjunan 等 - 2007 - Fourier transform infrared and Raman spectral assi DOI: 10.1016/j.saa.2006.09.044 -
Hydroxyl (O-H) luottamus 1,0
“Explicit assignment: 'Peaks of O-H (3500 cm-1)'”
Mujbil 等 - 2022 - Utilization of Metal Oxides Nanoparticles in Modul DOI: 10.3390/met12091413 -
luottamus 1,0
“Associated with free-hydroxyl group's stretching frequency.”
Narayanan 等 - 2022 - A Novel Insight Into the Fabrication of Polyhydrox DOI: 10.21203/rs.3.rs-924055/v1 -
Hydroxyl (O-H) luottamus 1,0
“Derived from group -OH from water or unbound polyols”
Oliwa 等 - 2021 - Effects of Various Types of Expandable Graphite an DOI: 10.3390/ma14071801 -
Hydroxyl (O-H) luottamus 0,95
“Explicit assignment in text: 'group (-OH) at around 3500 cm-1' and 'absence of terminal hydroxyl groups'.”
Singh 和 Samra - 2007 - Surface and bulk structure characterization of pro DOI: 10.1080/00222340701457493 -
Hydroxyl (O-H) luottamus 0,9
“Explicit assignment: broad absorption band around 3500 cm-1 corresponding to -OH group.”
Balavijayalakshmi 和 Manju - 2016 - Investigation of structural, optical and morpholog DOI: 10.1016/j.mssp.2016.03.019 -
Hydroxyl (O-H) luottamus 0,9
“Explicit assignment: 'cm21 OH2 is a characteristic absorption for group; 3500'.”
Dai 等 - 2003 - Ambient-temperature incorporated hydrogen in Nb S DOI: 10.1063/1.1574842 -
Hydroxyl (O-H) luottamus 0,9
“Peaks in OH stretching region assigned to OH groups.”
Deon 等 - 2009 - Coupled boron and hydrogen incorporation in coesit DOI: 10.1127/0935-1221/2009/0021-1843
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