What absorbs at 3735 cm⁻¹ in an FTIR spectrum?
A band near 3735 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 6 cited sources
Hiter odgovor
A band near 3735 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 |
| Water (H2O) | 2 | 2 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Silicon (Si) | 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 |
|---|---|---|---|
| Nanocellulose | 3735, 1540, 1646 | Hydroxyl (O-H), Carbohydrate | 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 3735 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
-
Silanol (Si-OH) zaupanje 1,0
“lated silanol peak at 3735 fresh Si-BEA and Ti-BEA samples All changes discussed above relate to silanol groups and do not displayed equivalent peak areas (less than 5% difference) while the necessarily prove any change in the actual Sn sit”
Effect of water treatment on Sn-BEA zeolite: Origin of 960 cm-1 FTIR peak DOI: 10.1016/j.micromeso.2015.02.012 -
Hydroxyl (O-H) zaupanje 1,0
“only OH-Rb-OH, OH-Rb-F have licic magnesium mica has IR absorptions at 3735 (m), 3695 any expression in the principal OH-stretching region of the”
Synthesis and solid solution in “rubidium richterite”, Rb(NaCa)Mg5Si8O22(OH,F)2 DOI: 10.1007/s00269-019-01037-x -
Hydroxyl (O-H) zaupanje 1,0
“The transmittance band for -OH at 3735 cm-1, characteristic for the "free" OH cm-1, cellulose [63].”
Bacterial Nanocellulose from Side-Streams of Kombucha Beverages Production: Preparation and Physical-Chemical Properties DOI: 10.3390/polym9080374 -
Hydroxyl (O-H) zaupanje 1,0
“At 400 and 450 the cm-1), cm-1) 3735 and 3558 -OH stretching vibration or water main chain of EVA broke and released alkanes (2930 olefin (3087 and 1639 cm-1).”
Enhancing Char Formation and Flame Retardancy of Ethylene-Vinyl Acetate Copolymer (EVA)/Aluminum Hydroxide (ATH) Composites by Grafting Ladder Phenyl/Vinyl Polysilsesquioxane (PhVPOSS) DOI: 10.3390/polym15153312 -
zaupanje 1,0
“Indeed, upon heating main bands at 3745 and 3735 cm1 are found in Y and MOR samples, with additional absorptions at ca.”
Sacchetto 等 - 2013 - The interactions of methyl tert-butyl ether on hig DOI: 10.1039/c3cp51684a -
Hydroxyl (O-H) zaupanje 1,0
“A broad feature of OH stretching vibration, cm-1 attributable to OH stretching mode of SiOH group, together with a negative band at 3735”
Satter 等 - 2020 - Water-Resistant Pt Sites in Hydrophobic Mesopores DOI: 10.1021/acscatal.0c02816
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