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
Mabilis na sagot
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.
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| 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 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Mga posibleng materyales
| Materyal | Sumusuportang mga peak | Mga overlapping na grupo | Mga nasiping sanggunian |
|---|---|---|---|
| Silica | 3610, 1100, 1080 | Silicon (Si), Hydroxyl (O-H), Silanol (Si-OH) | 1 |
Ang mga materyales ay ipinapakita lamang kapag ang parehong literatura pool ay sumusuporta sa banda na ito at hindi bababa sa isang karagdagang katangian na tuktok.
Logic ng spectrum
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.
Paggamit sa totoong mundo
Ang uri ng query na ito ay karaniwan sa pagtukoy ng polymer, screening ng hindi kilalang plastic, pag-troubleshoot ng QC, pag-verify ng recycled na materyal, at pagsusuri ng pagtatalaga ng peak na may suporta ng literatura.
Mga karaniwang pagkakamali
- Pagtrato sa isang nakahiwalay na banda bilang patunay ng isang materyal nang hindi sinusuri ang hindi bababa sa isa o dalawang sumusuportang peak.
- Hindi pinapansin ang overlap: maraming functional group ang maaaring mag-ambag malapit sa parehong wavenumber.
- Pag-laktaw sa pagpapatunay kapag ang mga additives, blends, oxidation, o contamination ay maaaring mag-distort ng spectrum.
Payo sa pagpapatunay
Kapag nananatili ang kalabuan, patunayan ang hypothesis gamit ang DSC, GC-MS, o TGA, lalo na para sa mga blend, degraded na sample, at filled polymers.
Literatura sa likod ng mga pagtatalagang ito
-
kumpiyansa 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) kumpiyansa 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) kumpiyansa 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) kumpiyansa 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) kumpiyansa 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 kumpiyansa 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 kumpiyansa 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) kumpiyansa 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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