What absorbs at 3610 cm⁻¹ in an FTIR spectrum?
A band near 3610 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
Hiter odgovor
A band near 3610 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) | 10 | 8 | 1,0 |
| Silicon (Si) | 5 | 5 | 1,0 |
| Silanol (Si-OH) | 5 | 3 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Bronsted acid site | 1 | 1 | 1,0 |
| Bromine | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 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 |
|---|---|---|---|
| Silica | 3610, 1100, 1080 | Silicon (Si), Hydroxyl (O-H), Silanol (Si-OH) | 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 3610 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
-
zaupanje 1,0
“2(cid:2) at = This result is inconsistent with the work by HZSM5 cm-1, of the band at 3610 which was due to partial exchange of Aboul-Gheit et al.”
IR study of iridium bonded to perturbed silanol groups of Pt-HZSM5 for n-pentane isomerization DOI: 10.1016/j.apcata.2011.12.039 -
Silicon (Si) zaupanje 1,0
“53 cm-1 Four bands were observed in the spectra of the three zeolites between 3500 to 3800 25 54 55 cm-1, cm-1 the band at 3610 is assigned to Si-OH-Al groups, which are associated with 26 56 57”
Zhao 等 - 2019 - Comparison of Direct, Selective Oxidation of Metha DOI: 10.1021/acs.jpcc.9b04388 -
Hydroxyl (O-H) zaupanje 1,0
“cm-1) (≈3610 In addition, Ca-OH stretching vibrations from crystalline jaffeite and cm-1) (≈3540 α-C α-C 2SH can be observed in the spectra of S0.”
Phase Composition of Silica Fume—Portland Cement Systems Formed under Hydrothermal Curing Evaluated by FTIR, XRD, and TGA DOI: 10.3390/ma14112786 -
Silicon (Si) zaupanje 1,0
“32 112 SiO-H respectively.21-25 groups and isolated external groups, HB0.6 63 83 136 cm(cid:3)1 HB2.0 163 185 242 The band at 3610 is commonly assigned to the bridging (Si-(OH)-Al), hydroxyl groups which cause strong Brønsted”
Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4′-ethylbenzoyl)benzoic acid dehydration DOI: 10.1039/c7ra13576a -
Silicon (Si) zaupanje 1,0
“The component at 3610 cm-1 is due to Si(OH)Al groups and exhibit Brønsted acidity.”
Hydrogenating activity of Pt/zeolite catalysts focusing acid support and metal dispersion influence DOI: 10.1016/j.apcata.2015.03.027 -
Bromine zaupanje 1,0
“All samples The observed decrease in intensity for the band at 3610 which is characteristic of Brønsted acid sites, agrees well with the values for the exchange degree calculated on the were preliminary evacuated at 400 °C.”
Mihaylov 等 - 2022 - Purification of Hydrogen from CO with CuZSM-5 Ads DOI: 10.3390/molecules27010096 -
Alkyl C-H zaupanje 1,0
“It was found that the OH stretch cm-1 cm-1, cm-1 cmshifted to 3610 the C-H stretchat 2960 shifted to 2800 at 3600 1,”
Sharma 和 Sharma - 2019 - DOI: 10.4152/pea.201901001 -
Silicon (Si) zaupanje 1,0
“As shown in Figure 4c, the large peak at 3610 is associated with the framework Si(OH)Al structure, which is ascribed to Brønsted acid groups.”
Relationship between Acidity and Activity on Propane Conversion over Metal-Modified HZSM-5 Catalysts DOI: 10.3390/catal11101138
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