What absorbs at 884 cm⁻¹ in an FTIR spectrum?
A band near 884 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
Kiire vastus
A band near 884 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.
Võimalikud funktsionaalrühmade määramised
| Funktsionaalrühm | Toetavad faktid | Tsiteeritud allikad | Kõrgeim usaldusväärsus |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Carbonate | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
Reiting kajastab kogunenud kirjanduslikke tõendeid, mitte ühte autoriteetset reeglit. Kinnitage alati oma proovi kontekstis.
Võimalikud materjalid
| Materjal | Toetavad piigid | Kattuvad rühmad | Tsiteeritud allikad |
|---|---|---|---|
| alumina | 884, 460, 1000 | Metal oxygen, Siloxane (Si-O-Si), Silicon-oxygen (Si-O) | 1 |
Materjale kuvatakse ainult siis, kui sama kirjanduse kogum toetab seda riba ja vähemalt ühte täiendavat iseloomulikku piiki.
Spektri loogika
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 884 cm⁻¹ is usually not enough for material identification by itself.
Reaalse maailma kasutus
Seda tüüpi päring on tavaline polümeeri tuvastamisel, tundmatu plasti sõeluuringul, kvaliteedikontrolli probleemide lahendamisel, ringlussevõetud materjali kontrollimisel ja kirjandusel põhineval piirkinnituste ülevaatel.
Levinud vead
- Ühe isoleeritud riba käsitlemine materjali tõendina ilma vähemalt ühte või kahte toetavat piiki kontrollimata.
- Ülekattumise ignoreerimine: mitu funktsionaalrühma võivad anda panuse sama lainearvu lähedal.
- Valideerimise vahelejätmine, kui lisandid, segud, oksüdatsioon või saastumine võivad spektrit moonutada.
Kontrollimise nõuanne
Kui ebakindlus püsib, kinnitage hüpotees DSC, GC-MS või TGA abil, eriti segude, lagunenud proovide ja täidetud polümeeride puhul.
Nende määramiste taga olev kirjandus
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usaldusväärsus 1,0
“659.7 CO32(cid:2) u2 Out-of-plane bending vibration of 883.7 Strong u3 929.6 Very strong Si-O asymmetric stretching vibration of silicate SO42 u3 S-O stretching vibration of 1097 Small shoulder 1114.2”
Theoretical and experimental study of structures and properties of cement paste The nanostructural aspects of C–S–H DOI: 10.1016/j.jpcs.2011.05.001 -
Ring structure usaldusväärsus 1,0
“Fourier transform infra-red (FTIR) analysis cm-1 confirm 3:Ce3+ cm-1 The FTIR spectra of CaSiO phosphor was recorded in the range 400 - 4000 to the functional groups presentintheobtainedsamples,Fig.2.FTIRspectrashowstrongtransmittancepeaksa”
Dhanu 等 - 2020 - Photoluminescence of mixed phase CaSiO3Ce3+ nanop DOI: 10.1016/j.ijleo.2020.165139 -
Aromatic ring usaldusväärsus 1,0
“9 is attributed to 1,4-disubstitution of the aromatic ring inpolyaniline.However,therearethreepeaksat884(w),854 (w)cm-1 (m), and 800 on curve 1 in Fig.”
Li 和 Mu - 2005 - The electrochemical activity of sulfonic acid ring DOI: 10.1016/j.synthmet.2004.12.015 -
Carbonate usaldusväärsus 1,0
“Furthermore, a closer look atthe singlet band 2-1 at 861-864 is probably due to the n ACC.15,32,33 absorption band of carbonate groups from 2-3 singlet reveals a progressive peak shift from 884 (keel), n cm(cid:2)1 887 (needles), to 888 (pl”
Long 等 - 2012 - From synthetic to biogenic Mg-containing calcites DOI: 10.1039/c2cp22453d -
usaldusväärsus 1,0
“The traces of the organic cm-1 materials from the PVP were at 1535 and 2787 and cm-1, are associated with Si-O stretching at 884, and 889 could be attributed to C-H bending vibrations [47, 48].”
Alibe 等 - 2019 - Effects of polyvinylpyrrolidone on structural and DOI: 10.1007/s10973-018-7874-7 -
Protein usaldusväärsus 1,0
“cm-1 Increase in absorption at ~884 due to alterations in phosphorylated proteins suggest that more extensive phosphorylation occurs in malignant compared to benign samples.”
ATR-FTIR spectroscopy as adjunct method to the microscopic examination of hematoxylin and eosin-stained tissues in diagnosing lung cancer DOI: 10.1371/journal.pone.0233626 -
usaldusväärsus 1,0
“ESI-MS molecular-ion peak 884.42, corresponding to H+ + 1H [Zn(L5) ].”
Gusev 等 - 2020 - Synthesis, Photoluminescence and Electrical Study DOI: 10.3390/ma13245698 -
usaldusväärsus 1,0
“The band at cm-1 δ corresponds to the sAl-O-H mode of boehmite 1,072 cm-1 and the bands at 884, 740, 621, and 479 are attributed Al-O to the bonds of boehmite (Li et al.”
Liu 等 - 2012 - Dechlorinating transformation of propachlor throug DOI: 10.1007/s11368-012-0506-0)
Kas teil on selle ribaga spekter?
Laadige üles oma FTIR spekter ja saage sekunditega täielik tõlgendusaruanne — piikide määramised kirjandusviidetega, raamatukogu vasted ja usaldusväärsusega hinnatud tõendite ahel.