What absorbs at 706 cm⁻¹ in an FTIR spectrum?
A band near 706 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
Ātra atbilde
A band near 706 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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| Metal oxygen | 3 | 3 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Borate | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 0,9 |
| Boron nitrogen | 1 | 0 | 0,9 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Iespējamie materiāli
| Materiāls | Atbalstošie pīķi | Pārklājošās grupas | Citētie avoti |
|---|---|---|---|
| AuNPs | 706, 1646, 1721 | Amide, Methacrylate | 1 |
| nanocomposite | 706, 2921, 3300 | Methacrylate, Metal oxygen | 1 |
| cellulose | 706, 1735, 1650 | Methacrylate, Amide | 1 |
| biochar | 706, 1640, 1115 | Methacrylate | 1 |
| wood | 706, 1740, 1730 | Methacrylate | 1 |
| calcite | 706, 2850, 2864 | Methacrylate, Amide | 1 |
Materiāli tiek parādīti tikai tad, ja šo joslu un vismaz vienu papildu raksturīgo pīķi atbalsta tā pati literatūras kopa.
Spektra loģika
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 706 cm⁻¹ is usually not enough for material identification by itself.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
-
pārliecība 1,0
“The FT-IR cm-1 spectrum showed a broad peak at 706 due to Ti-O”
Anjum 等 - 2023 - Photocatalytic degradation of reactive violet 1 by DOI: 10.30955/gnj.004281 -
Borate pārliecība 1,0
“The absorption band [8], 706cm-1 is assigned to B-O-B bending vibration, the at (cid:5) Bexp(cid:4) cm-1 is due to the stretching band between 1100 and 800 hν , α (ν) = 4]- [BO (3) tetrahedral borons and broad absorption modes of (cid:2)E c”
Kolavekar 等 - 2017 - Characterization and optical properties of Pr2O3-d DOI: 10.1007/s12034-017-1400-6 -
Amide pārliecība 1,0
“FTIR spectra of CNF/AuNPs/anti-colistin Ab, and exhibited Validation study cm-1, cm-1, cm-1 transmittance peaks at 706 1246 and 1514 corresponding to amide IV, due to presence of OCN banding;”
Kumar 等 - 2022 - Electrochemical immunosensor for the detection of DOI: 10.1007/s13205-022-03252-w -
Alkyl C-H pārliecība 1,0
“The peak at 706 is assigned to alkyl bendbiochars from unmixed substrates at 650 °C are more stabi-”
Biochar from co-pyrolysis of urban organic wastes—investigation of carbon sink potential using ATR-FTIR and TGA DOI: 10.1007/s13399-020-01000-9 -
Silicon (Si) pārliecība 1,0
“cm-1 symmetric stretching vibrations of inner Si/Al-O structure, respectively), 1180 and ZY characteristic peaks were found at 1050 cm-1 and 706 cm-1 (asymmetric and sym4 cm-1 788 (asymmetric and symmetric stretching vibrations of external”
Novel Biocomposite Films Based on High Methoxyl Pectin Reinforced with Zeolite Y for Food Packaging Applications DOI: 10.3390/foods11030360 -
Acetate pārliecība 1,0
“The band at 1,706 cm-1 is ascribed to the stretching vibration C=O, wavenumber of 3460 [47,48].”
Xu 等 - 2019 - New Perspective on Wood Thermal Modification Rele DOI: 10.3390/polym11071145 -
Metal oxygen pārliecība 0,9
“attributed to Ag-O stretching vibration”
Al-Qahtani 等 - 2022 - Structural, morphological, optical and electrochem DOI: 10.15251/JOR.2022.182.187 -
Carbonate pārliecība 0,9
“V4 mode of calcite”
Loy 等 - 2016 - Effects of Calcination on the Crystallography and DOI: 10.1155/2016/2914368
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