What absorbs at 3617 cm⁻¹ in an FTIR spectrum?
A band near 3617 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 5 cited sources
Hiter odgovor
A band near 3617 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.
Možne dodelitve funkcionalnih skupin
| Funkcionalna skupina | Podporna dejstva | Citirani viri | Najvišje zaupanje |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 0,8 |
| Carbon dioxide | 1 | 0 | 1,0 |
Razvrstitev odraža zbrane literaturne dokaze, ne enega avtoritativnega pravila. Vedno preverite glede na kontekst vašega vzorca.
Možni materiali
| Material | Podporni vrhovi | Prekrivajoče se skupine | Citirani viri |
|---|---|---|---|
| TiO2 | 3617, 1700, 1093 | Hydroxyl (O-H) | 1 |
| montmorillonite | 3617, 1637, 523 | Hydroxyl (O-H), Water (H2O) | 1 |
| water | 3617, 1018, 2945 | Hydroxyl (O-H), Water (H2O) | 1 |
Materiali so prikazani le, ko ista literaturna podlaga podpira ta pas in vsaj en dodatni karakteristični vrh.
Logika spektra
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 3617 cm⁻¹ is usually not enough for material identification by itself.
Uporaba v resničnem svetu
Ta vrsta poizvedbe je pogosta pri identifikaciji polimerov, pregledovanju neznanih plastičnih mas, odpravljanju težav pri QC, preverjanju recikliranih materialov in literaturno podprtem pregledu dodelitev vrhov.
Pogoste napake
- Obravnavanje enega izoliranega pasu kot dokaza o materialu brez preverjanja vsaj enega ali dveh podpornih vrhov.
- Ignoriranje prekrivanja: več funkcionalnih skupin lahko prispeva blizu istega valovnega števila.
- Izpuščanje validacije, ko lahko dodatki, mešanice, oksidacija ali kontaminacija popačijo spekter.
Nasvet za preverjanje
Ko ostaja dvoumnost, potrdite hipotezo z DSC, GC-MS ali TGA, zlasti za mešanice, degradirane vzorce in polnjene polimere.
Literatura za temi dodelitvami
-
Hydroxyl (O-H) zaupanje 1,0
“mated for bulk hydrogen and, when possible, individual sistent for peaks at 3617 and 3540 cm The Kunlun diop- -1 O-H stretching bands.”
Site-specific hydrogen diffusion rates during clinopyroxene dehydration DOI: 10.1007/s00410-016-1262-8) -
Hydroxyl (O-H) zaupanje 1,0
“cm-1 In the 3800-3100 region, typical of the ν(OH) manifestations (inset of Figure 3a), the relatively cm-1 narrow band at 3617 is due to the stretching mode of OH groups formed by dissociative chemisorption of phenol and likely interacting”
Mino 等 - 2016 - A surface science approach to TiO2 P25 photocataly DOI: 10.1016/j.apcatb.2016.05.029 -
Hydroxyl (O-H) zaupanje 1,0
“The characteristic peak of the Mt was exhibited at 3617 cm-1, which is cm-1 the O-H stretching vibration of Al-OH and Si-OH [35].”
Yuan 等 - 2019 - Ultrasound-Assisted Preparation, Characterization, DOI: 10.3390/ma12244148 -
Hydroxyl (O-H) zaupanje 0,9
“Band shift from 3588 to 3617 indicates weakened H-bond.”
Noguchi - 2008 - FTIR detection of water reactions in the oxygen-ev DOI: 10.1098/rstb.2007.2214 -
Water (H2O) zaupanje 0,8
“Explicitly mentioned as 3617cm-1 in context of water vibration.”
Fukuda 等 - 2013 - Detection of a protein-bound water vibration of ha DOI: 10.2142/biophysics.9.167
Imate spekter s tem pasom?
Naložite svoj FTIR spekter in v nekaj sekundah pridobite celotno poročilo o interpretaciji — dodelitve vrhov z literaturnimi citati, ujemanja knjižnice in verigo dokazov z oceno zaupanja.